{"chunkIndex": 0, "stories": [{"id": "f39919a0e2ff", "title": "Budapest", "slug": "budapest", "headline": "Budapest is Hungary's capital", "summary": "The capital of Hungary is Budapest \u2014 originally two cities, Buda and Pest, merged in 1873", "source": "The capital of Hungary is Budapest \u2014 originally two cities, Buda and Pest, merged in 1873", "sourceUrl": "https://en.wikipedia.org/wiki/Budapest", "articleUrl": "https://en.wikipedia.org/wiki/Budapest", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [0, 2, 4, 1, -4, 1, 9, 0, 0, -3, -5, -12, -1, 5, 2, -7, -9, -11, 1, -1, -2, -2, 4, -3, 3, 2, -4, -2, -1, -16, 2, -2, -11, 1, 4, 2, 2, 2, 5, -7, 13, 9, -6, -11, 6, -5, 2, 6, -9, 3, 11, -3, -3, 4, -3, 5, -2, 4, 3, 9, 0, -9, -24, 1, 0, -5, -4, -5, -9, 3, 4, 9, 2, 4, -3, 2, 3, 1, 1, 0, 4, 0, 5, 1, -8, 7, -5, -2, 5, -7, 3, -6, 13, 2, 6, -1, 3, 7, 7, 40, -5, 3, 1, -6, -3, 6, 0, -3, 3, 13, 3, -2, 10, -2, -3, -6, 7, -2, -2, -3, 5, -13, 3, 3, 3, 2, -4, 6, 4, -7, 4, 5, -4, 14, 1, -2, 0, 2, -6, -13, -4, -11, 2, -3, -11, 0, -4, -4, 1, 4, -8, -5, -3, 3, 3, 4, 15, 10, 10, 3, -5, 0, -15, 8, 4, -17, -1, 3, -2, 3, -3, 3, 7, 0, 4, -3, 0, 1, 1, 7, -7, -5, -6, -2, 5, 3, -2, -10, 3, -6, -1, 3, 4, 1, -5, 2, 2, 7, 11, -1, -2, 2, 4, -2, 0, 1, 3, -4, 1, 2, 4, 3, 6, -12, 4, -3, 4, 3, 4, 6, -5, -11, -14, -28, -6, -10, -4, -2, 2, -2, -1, -2, -7, 4, 0, -5, 7, 0, 6, 8, 5, 4, -2, 3, -9, 0, -5, -6, -6, 15, -3, 2, 1, 9, 1, 6, -6, 2, 5, 9, 5, -11, 1, 4, 4, -4, -5, 3, -1, -1, 1, 1, -3, -4, 3, 1, 1, 3, 1, -9, 3, 1, 4, -4, 1, 5, -4, -3, 8, -3, -5, 0, 4, -1, 5, -2, -15, 8, 1, 2, 17, 1, 7, -5, -9, 0, 3, -5, 0, 12, 1, -2, 2, -4, 0, 3, 0, -6, 2, -30, 8, 5, 2, 7, -3, 1, 9, -1, -7, 16, -11, 5, 2, -1, 4, -3, 6, 0, 1, 0, 7, 11, -11, 0, 4, -2, 2, 2, 9, 2, -8, 14, -4, -6, 5, -7, 9, -6, 5, -9, 0, -3, -4, 5, 0, -1, 4, 3, 3, 1, -3, -4, -7, 8, -9, -3, -2, 0, 4, -1, -6, -5, -8, 4], "explanation": ["The merger of Buda and Pest in 1873 created Budapest, which now stands as the capital of Hungary. This historical event unified the two cities into one, forming the modern capital that serves as the heart of the nation."], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/View_from_Gell%C3%A9rt_Hill_to_the_Danube%2C_Hungary_-_Budapest_%2828493220635%29.jpg/1280px-View_from_Gell%C3%A9rt_Hill_to_the_Danube%2C_Hungary_-_Budapest_%2828493220635%29.jpg"}, {"id": "500a77d0849b", "title": "Naypyidaw", "slug": "naypyidaw", "headline": "Naypyidaw replaced Yangon as Myanmar's capital in 2005", "summary": "The capital of Myanmar (Burma) is Naypyidaw \u2014 built in secret and announced in 2006", "source": "The capital of Myanmar (Burma) is Naypyidaw \u2014 built in secret and announced in 2006", "sourceUrl": "https://en.wikipedia.org/wiki/Naypyidaw", "articleUrl": "https://en.wikipedia.org/wiki/Naypyidaw", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [3, 4, 5, 0, 5, 6, 5, -4, -3, -1, -2, -8, 2, 6, 4, 4, -6, -16, 4, -6, 5, -3, 2, 0, 8, 2, -3, -1, -4, -13, 4, -15, -5, -1, -2, 4, -7, 4, 5, -9, 6, 3, 7, -10, 4, -8, 5, 2, -3, -3, 10, -3, 3, 9, 0, -6, -2, 5, 8, -1, 5, 2, -21, 3, -2, -2, 0, -11, 2, -1, -5, 3, -5, -1, 3, 1, -2, 8, -4, 0, 4, -4, 8, 0, -3, 3, -2, 4, 1, -5, -3, -6, 7, 3, -3, -1, -1, 8, -5, 42, -8, -1, -3, -2, 7, -3, 3, 2, 6, 2, 4, -2, 8, 3, -8, -3, 1, 1, -6, 9, 6, -3, 2, 3, -3, 3, 0, 2, 5, -6, -4, 0, 1, 4, 2, -2, 3, -8, 3, -17, -3, -4, -4, -4, -13, 5, 0, -5, 4, 7, -7, 4, 2, 3, 8, 0, -1, 10, 10, -7, 7, 2, -12, 5, 5, -14, -4, 6, 5, -1, -5, 3, -1, -2, 7, -2, 9, -8, 2, 5, -4, -10, -7, -2, 6, 0, 5, 3, 9, 1, -5, 10, 5, -2, 3, -9, 7, -8, 15, 0, -1, 3, 3, -6, -4, 0, 5, -1, 3, 9, -1, 1, 1, -9, 0, -5, 5, 3, -1, -7, -3, -11, -4, -36, 2, -4, -7, 1, -1, -3, 0, 4, 3, 6, 2, -3, 10, 7, 3, 9, 1, 5, -1, 6, 6, -6, -13, -6, 0, 15, -6, -1, 0, 7, 5, -2, -14, 6, 8, 0, 2, -4, -9, 5, -3, -1, -10, 3, -6, -4, -2, -4, 5, -4, 2, -2, 4, -6, 1, 1, 1, 4, 1, 0, 7, 3, 7, -10, -1, -4, -1, 3, 3, -2, 5, -1, -6, 6, 1, -4, 3, -3, 6, -1, -2, 11, 0, -6, 4, 1, 3, -2, 0, -2, 0, 4, 4, -13, -6, -34, -2, -5, -5, -2, -3, 5, 14, -6, 5, 6, -2, 4, -7, 1, 4, -1, 5, 6, 7, -3, 13, 17, -2, 2, 5, 3, 8, 2, 0, 1, -8, 4, -5, -6, 3, -1, 5, -5, 8, -7, 0, 1, 5, 10, 0, 2, -1, 5, -1, -3, -3, -7, -8, 8, -1, 7, -6, 3, -3, -7, -11, -1, -7, 3], "explanation": ["Naypyidaw became the capital of Myanmar in 2005, replacing Yangon. This significant change marked a new era for the country.", "The city was officially announced to the public in 2006. This announcement took place on Armed Forces Day, highlighting its importance.", "Naypyidaw serves as the seat of Myanmar's government, housing key institutions like the Assembly of the Union and the Supreme Court. It is also notable for its large size and low population density."], "whyItMatters": "Understanding the capital change is crucial for grasping Myanmar's political and administrative evolution.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/9/94/NPT_Water_Fountain.jpg/1280px-NPT_Water_Fountain.jpg"}, {"id": "c03e0b39a6cf", "title": "The capital of Turkey is Ankara, not Istanbul", "slug": "the-capital-of-turkey-is-ankara-not-istanbul", "headline": "Did you know Ankara has more skyscrapers than Istanbul?", "summary": "The capital of Turkey is Ankara, not Istanbul \u2014 moved by Atat\u00fcrk in 1923", "source": "The capital of Turkey is Ankara, not Istanbul \u2014 moved by Atat\u00fcrk in 1923", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_Ankara", "articleUrl": "https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_Ankara", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [7, -4, 4, 3, -6, -2, 5, 0, 1, -1, -8, -12, 0, -2, -1, -4, -4, -7, -3, -2, -2, 0, -1, -11, 4, -2, 2, 0, -8, -12, 6, -12, -5, -7, 4, 3, 0, 5, 3, -1, 1, 2, 2, -9, 8, 0, 1, -3, -2, 0, 4, 5, 4, 1, 1, 2, -6, 3, 3, 1, 6, -6, -21, 5, -2, 8, -1, -2, -2, 4, 4, 3, -2, 4, 6, -6, 3, 7, -2, -6, 14, -1, -7, 0, -8, 0, -7, 0, 1, -5, 3, -3, 10, 0, 4, -2, 4, 3, 6, 37, -2, 5, 0, 3, 2, 6, 2, -1, 0, 10, -4, -3, 9, 6, 3, -9, 12, -6, -3, 1, 4, -3, 4, 2, 2, -7, -3, -1, 13, 0, 3, -7, -6, 6, 8, 3, 1, -2, -4, -15, 1, -1, 3, -2, -10, 10, 1, -8, -4, -2, -8, -7, 5, 3, -1, -2, 9, 12, 4, -6, 2, -1, -7, 5, 1, -13, -3, -2, 1, 3, 3, -2, 3, 6, 16, -5, -1, 7, 2, 2, 5, -3, -8, 1, 6, 0, -1, 0, 7, 2, 3, 13, -2, 1, -6, -2, 7, 6, 15, 0, -1, 6, -11, 2, -11, 9, -3, -3, -11, -2, 9, 2, -1, -4, -5, -9, 3, 1, -1, -4, 9, -5, -2, -32, -1, -12, -5, 6, 1, -2, 2, 3, 0, -4, -5, -4, 5, 0, 3, -9, -2, 10, -10, -6, 6, -7, -10, 5, -3, 16, 4, 7, -5, 7, -1, 1, -8, 12, 4, 12, -4, -10, -3, 2, 0, 2, -2, -2, 6, 0, 2, 0, 6, -13, 3, -8, 1, 2, 2, -5, 6, 2, 7, 0, -1, -6, 7, 8, 7, -7, 4, 1, 7, 6, 11, -6, -2, 6, 3, -2, 13, 4, 3, -1, -4, 3, -4, -8, -1, 2, 3, 0, -4, 1, 0, -6, -7, -4, 0, -32, 5, 7, -10, -1, -2, 0, 4, -3, -5, 4, -11, -3, -3, -4, -5, 3, 1, -1, 8, -3, 4, 9, -12, -4, 2, 6, 2, 9, 5, 4, -6, 11, -9, -7, 3, 1, 12, -15, 0, -7, -2, 4, -2, 11, 6, 6, 0, -3, -8, -2, 2, 1, 3, 14, -1, -6, -11, -2, -2, 0, 2, -5, -2, 7], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Taj_Mahal_%28Edited%29.jpeg/1280px-Taj_Mahal_%28Edited%29.jpeg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "Yann; edited by Jim Carter", "explanation": ["Imagine you're planning a trip to Turkey and want to visit the tallest buildings in the country. You might think Istanbul is the place to go, but there's another city with even more skyscrapers.", "Ankara is like a city built for the sky, with 13 skyscrapers towering over 150 meters high. This makes it a hub for tall buildings, unlike Istanbul."], "example": "If you visited Ankara in 2020, you'd see the Elya Tower, the tallest at 210 meters.", "whyItMatters": "The capital of Turkey is Ankara, not Istanbul."}, {"id": "3d95a6a9adbd", "title": "Bras\u00edlia", "slug": "bras-lia", "headline": "Bras\u00edlia was founded in 1960", "summary": "The capital of Brazil is Bras\u00edlia \u2014 built from nothing in the 1950s in the middle of nowhere", "source": "The capital of Brazil is Bras\u00edlia \u2014 built from nothing in the 1950s in the middle of nowhere", "sourceUrl": "https://en.wikipedia.org/wiki/Bras%C3%ADlia", "articleUrl": "https://en.wikipedia.org/wiki/Bras%C3%ADlia", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [0, 4, 8, -1, 6, 1, 0, 5, 1, 2, 2, -8, -4, 5, -4, -1, -8, -6, 0, -5, 6, -1, -8, 4, 8, 7, -2, 9, -12, -16, 0, -1, 7, -6, -3, 2, 0, -2, 1, -10, 1, 6, 8, -8, -5, -3, 7, 6, 6, -2, 8, 2, -4, -3, -8, 5, 0, 2, 3, -1, 5, 0, -24, -1, 4, -4, 0, -1, -2, -4, 6, -2, 7, 1, 15, 8, -2, 2, 7, 1, 1, -6, -8, 8, -7, 6, -4, 2, 1, 9, -2, 4, 3, 2, -4, -4, -6, 14, 2, 41, 1, 0, 4, 2, 6, 1, 3, 1, 6, 1, 8, -6, -2, -2, 3, -10, 4, 1, -1, 3, -1, -3, -4, -6, 7, 4, 1, 3, 3, -7, 0, 0, -2, 2, -9, -2, 7, -1, -4, -15, -6, -4, 0, -4, -4, 5, 1, 2, -1, 3, -6, -3, 2, 5, 2, -12, 3, -2, 4, -7, 3, -9, -10, 14, 4, -10, -7, 2, -3, 4, 4, -3, -4, 11, 12, -4, 2, 1, -11, -5, 4, -5, 0, -4, -5, 7, -2, 1, 2, -1, -1, 9, 0, 12, 0, -2, 1, -3, 7, 1, -5, 2, 1, -14, -1, 2, 10, 7, 8, 9, 0, 5, 5, -10, -1, 7, -4, -9, -7, -2, 2, -7, -7, -32, 8, -10, -1, 2, 3, 1, -4, 8, 4, 4, -2, -2, 15, -8, 1, -5, 4, -1, 1, 3, 0, -7, -8, 5, -4, 11, 0, 5, -6, 10, 4, 6, -7, 2, 1, 9, -3, -4, 3, 7, 2, 0, 3, 1, -2, 0, -4, -3, 3, 2, -4, -7, 0, 1, 2, -5, 3, 0, 9, 3, -7, 9, -4, -10, -3, -6, -7, 4, 1, 9, 17, -2, -13, 6, 0, 8, 2, 5, 8, -3, -5, 0, 1, 2, 10, 10, -7, 2, -2, 2, 0, -6, 3, -5, -8, -31, 3, 0, -2, 1, 5, -4, 3, -4, 5, 13, -3, 6, -4, 0, 2, -1, -1, 6, 1, -10, 3, 9, -9, -5, 2, -1, 5, 4, 10, -1, 5, 8, -1, -6, -1, -2, 5, -9, -6, -16, -3, 4, -1, 1, -6, 2, -2, -6, 3, -1, -11, 6, 0, 9, -6, -1, -7, -1, 5, -6, -1, -3, -7, -3], "explanation": ["Bras\u00edlia is Brazil's third-most populous city after S\u00e3o Paulo and Rio de Janeiro, with a population of 2.8 million. It is notable for its high GDP per capita among major Latin American cities. The city was named \"City of Design\" by UNESCO in October 2017 and has been part of the Creative Cities Network since then."], "whyItMatters": "Understanding Bras\u00edlia's founding year and its unique urban planning helps appreciate its historical and cultural significance in Brazil.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Planalto_Central_%28cropped%29.jpg/1280px-Planalto_Central_%28cropped%29.jpg"}, {"id": "81468604af5f", "title": "Canberra", "slug": "canberra", "headline": "Canberra is the capital of Australia", "summary": "The capital of Australia is Canberra \u2014 chosen as a compromise between Sydney and Melbourne", "source": "The capital of Australia is Canberra \u2014 chosen as a compromise between Sydney and Melbourne", "sourceUrl": "https://en.wikipedia.org/wiki/Canberra", "articleUrl": "https://en.wikipedia.org/wiki/Canberra", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [1, 3, -1, 4, 1, 7, 6, 3, -4, 0, -3, -12, -6, 5, 6, 1, -15, -4, -3, -1, -3, 4, -4, -6, 3, 7, 6, 0, -5, -13, -6, -5, 2, 1, -3, 1, 1, -1, -4, -6, 8, 9, 11, -2, -7, -3, 6, 9, -2, 1, 12, -1, 2, 7, 0, 8, -2, 1, 7, 2, -3, 2, -20, 4, 9, -3, -7, 1, -4, 2, -5, 5, -3, 2, 5, 1, 8, 6, 4, -7, 3, -8, -9, 7, -7, -5, 2, -4, -3, -8, 5, -7, 14, 4, -1, -1, 0, 9, 4, 39, -3, 1, -6, -1, 1, 3, 2, -2, 3, 3, 15, 0, 8, 4, -4, -3, 6, 0, -2, -6, 3, -5, -1, 6, 4, 10, 0, 4, 3, -6, 4, -3, 7, 2, 2, 4, 4, -3, 2, -7, -3, -9, -10, -2, -5, 5, 0, 3, -7, 7, -4, 3, 2, 1, 4, 5, 8, 4, 6, -4, 6, -6, -1, 13, 2, -20, -2, -6, 2, 0, 3, 6, -6, 4, 11, -8, 3, 0, 6, -3, 4, -3, -2, -4, 7, 2, -6, -3, 3, -18, 5, 2, 2, 7, -6, -5, 3, -3, 1, 1, -3, 6, -1, -3, -5, 9, 5, 0, 0, 5, -1, 1, 2, -14, -5, -5, 11, -4, -3, -2, 1, -1, 0, -32, 2, -9, -10, 9, 3, 0, 2, -3, 4, 2, 0, 7, 13, -1, 1, -12, 5, 0, 3, -4, 2, -14, -8, 1, 7, 26, -5, -5, 1, 4, -4, 6, -5, -7, 2, 6, 0, -3, -3, 9, 2, -4, -2, 3, -6, -6, -2, -6, -1, 5, 0, -15, -1, -4, 1, 0, -2, -1, 0, 2, -4, 5, 7, -3, 2, -7, 2, -8, 5, 2, 8, -3, -11, 1, -1, 3, 16, 7, 4, 2, -2, -1, -4, -1, 0, 8, 1, -2, -5, -2, -2, 0, 2, -10, -3, -29, 0, 9, -1, -3, -3, 3, 6, -9, 3, 10, 1, 1, -1, -4, 1, 9, 2, 2, 1, 0, 0, 12, -6, 2, 1, -4, 6, 8, -5, -3, -6, 6, -8, 3, -2, -9, 15, -2, 2, -10, 2, 3, -4, 6, -1, -3, 6, -2, 5, 2, -9, -1, -6, 9, -10, 0, -3, -4, 0, 4, -5, 2, -9, 0], "explanation": ["The area that became Canberra had been inhabited by Aboriginal Australians for up to 21,000 years. European settlement began in the 19th century, with landmarks like St John's Anglican Church and Blundells Cottage still standing today. This historical context highlights the city's deep roots in Australia's past."], "whyItMatters": "Understanding Canberra's status as Australia's capital helps appreciate its historical and political significance.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Canberra_panorama_from_Mount_Ainslie.jpg/1280px-Canberra_panorama_from_Mount_Ainslie.jpg"}, {"id": "e4e689effc70", "title": "Federal Capital Territory (Nigeria)", "slug": "federal-capital-territory-nigeria", "headline": "Why did Nigeria move its capital to Abuja?", "summary": "The capital of Nigeria is Abuja, not Lagos \u2014 moved in 1991 to a more central location", "source": "The capital of Nigeria is Abuja, not Lagos \u2014 moved in 1991 to a more central location", "sourceUrl": "https://en.wikipedia.org/wiki/Federal_Capital_Territory_(Nigeria)", "articleUrl": "https://en.wikipedia.org/wiki/Federal_Capital_Territory_(Nigeria)", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [5, 1, 6, 0, 5, 5, 5, 0, 3, 2, -5, -14, 5, -3, 0, -5, -14, -13, 0, 0, 3, 10, 1, -5, 6, 8, 2, 2, -13, -20, 4, -7, 3, -5, 1, 5, 7, 0, 9, 0, 1, 3, 0, -12, 1, 6, 5, 1, 3, 0, 7, 1, -1, 1, 1, 11, 7, 3, 2, -3, 1, -3, -20, 1, 9, -9, 4, -3, -3, 3, -5, 4, -3, 0, -2, 2, -2, 6, -1, -5, 1, -1, -3, -2, -2, -8, 0, -14, -2, -4, 6, 4, 15, -2, -2, -2, -3, 9, 2, 38, -4, 6, 6, 0, 0, 5, 4, 3, 3, 11, -7, 7, 4, 6, -1, 2, -3, -6, -2, 5, 2, -16, -3, -1, 0, 5, -6, -2, 7, -8, -8, -6, -8, 9, -6, 14, 3, -1, -1, -7, -3, -3, -6, -7, -3, 1, 0, 0, 0, 6, -12, 0, -5, 0, -5, -2, 8, 5, 8, -7, 0, -5, 3, 9, 6, -22, -18, 3, -2, -3, 2, 3, 3, 0, 11, -5, -2, 2, -1, 2, 10, -7, -5, -2, 2, -3, -2, 3, 1, 3, 2, 3, -2, 8, 1, 0, 8, 1, 12, -1, 0, 11, -3, -1, -2, -2, 5, 0, 3, 5, 3, 4, 4, -10, -4, -10, -5, 2, 3, -4, 0, -7, 1, -32, 2, -9, 1, 6, 3, 1, -4, -1, 0, 2, -1, -3, 3, -8, -2, -4, -1, 6, -6, 2, -2, -10, -2, 5, -1, 11, -6, 5, -4, 10, 0, 9, -17, 6, 4, 5, -1, -1, 0, 8, 0, 2, -1, 4, -3, 3, 1, 1, 9, -3, -5, 5, 6, -1, -1, -3, 7, -1, 3, -3, 0, -6, 6, -4, 3, 3, -2, -6, 8, 4, 10, -6, -7, 2, 1, 3, 4, 5, 5, -5, -6, -1, -6, -3, 3, 8, -7, -6, 2, 0, -13, -4, 0, -9, 1, -32, 2, 2, 4, -1, 8, -3, 4, -4, 5, 10, -4, 2, -5, -2, 4, -2, -2, 1, 9, 2, 9, 12, -3, -4, 9, -1, 4, 14, 2, 0, -2, 9, -2, -7, -11, -4, 9, -6, -5, -9, 5, 1, 1, 4, 4, 0, 1, 3, -6, 4, -4, -5, 3, 14, -2, -11, -4, -7, -3, 2, -4, 3, -5, 2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/f/f8/Nigeria_Federal_Capital_Territory_map.png", "explanation": ["Imagine you're trying to find a central meeting point for a group of friends spread across different cities. You want to minimize travel time for everyone.", "Nigeria needed a central location for its capital to be accessible to all its citizens. The Federal Capital Territory (FCT) was created to serve as this central meeting point."], "example": "Instead of traveling from Lagos to Abuja, citizens can now travel from any point within the FCT to the capital.", "whyItMatters": "The core idea is that a central location reduces travel time for everyone. Federal Capital Territory (FCT)"}, {"id": "f2de6f2e056e", "title": "Astana", "slug": "astana", "headline": "Astana is the capital city of Kazakhstan", "summary": "The capital of Kazakhstan is Astana \u2014 renamed from Nur-Sultan back to Astana in 2022", "source": "The capital of Kazakhstan is Astana \u2014 renamed from Nur-Sultan back to Astana in 2022", "sourceUrl": "https://en.wikipedia.org/wiki/Astana", "articleUrl": "https://en.wikipedia.org/wiki/Astana", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [0, -6, 3, 1, -7, -1, 6, 2, -5, -1, -3, -6, 0, -3, -4, -6, -4, -1, -6, -3, -4, 3, 5, -4, 2, 0, -3, 3, -3, -15, 3, -7, -6, -2, -4, 0, 2, -3, -3, -1, 7, 4, 7, -13, 2, -1, 1, -1, -2, -5, 6, 4, 2, 0, -5, -2, -1, 1, 9, 2, 6, -2, -23, -3, -8, 4, -3, -6, 2, 0, 5, 3, 1, 7, 6, -9, -1, 0, -5, -3, 4, -7, -9, -6, -5, -3, 0, 0, -1, 2, 8, -1, 15, 6, -6, 2, -1, 5, 10, 40, -8, 8, -12, -5, 0, -2, -6, 2, -1, 4, 8, 1, 6, 2, -3, -1, 13, 3, 0, 0, 3, -3, 0, 6, 7, 10, -5, 6, 10, -1, 10, 6, -4, 5, 4, -4, 6, -4, -6, -11, -2, -11, -1, -2, -8, 8, -6, -3, -7, -3, -7, 1, 9, 3, 1, 0, 6, 5, 1, 3, -1, 1, -9, 7, 2, -10, -9, 3, 6, 3, 0, 4, -3, -1, 17, -4, 4, -3, 3, 3, 7, -4, -1, -7, -1, -9, -9, -2, 13, -5, -3, 4, 3, 0, 0, 1, 3, -5, 12, -4, -1, 9, -3, -1, -1, 4, 1, -2, -5, 6, 3, 9, -2, -3, -1, -3, 5, -1, -3, -6, 5, 5, -7, -34, 10, -3, -7, 5, 3, -6, 8, 5, -5, 3, 4, -2, 8, -1, -1, -1, 9, -1, -6, -2, 0, -6, -10, 4, 2, 12, 0, -1, -5, 5, -5, 7, -17, 12, -10, 4, 0, -8, 4, 14, 3, -1, -4, 5, 5, -1, -3, 1, 5, -9, 7, -12, -2, -4, 2, 0, 3, 0, 6, 5, 6, -3, 9, -6, 0, -5, -3, 4, 1, 1, 11, -8, -12, 13, -3, 2, 5, 12, 6, -1, -13, 7, -3, -2, 6, 8, 0, 2, 2, -2, -3, 3, -3, -5, -1, -33, 4, -3, -3, 3, -1, 8, 7, -7, -5, 11, 3, 3, 4, -3, -8, 8, 0, 1, 4, -3, -2, 11, -6, 2, 1, -5, 4, 9, 7, -1, -3, 3, -4, -6, 1, -6, 16, -4, -1, -8, 1, -3, 0, 11, 0, -9, 1, 0, 1, 2, 0, -6, -7, 6, -1, 2, -5, -4, -3, 1, -2, -2, -2, 2], "explanation": ["In 2022, Astana reverted to its original name after being renamed Nur-Sultan in 2019 to honor former president Nursultan Nazarbayev. The city's history includes growth and transformation into a modern planned city under the guidance of Kisho Kurokawa. This renaming reflects the country's evolving political landscape and respect for its leaders."], "whyItMatters": "Understanding Astana's role as Kazakhstan's capital and its historical name changes is essential for comprehending the country's administrative and cultural evolution.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/c/c0/Central_Downtown_Astana_1.jpg"}, {"id": "045c99321fa3", "title": "Mongolia", "slug": "mongolia", "headline": "Can you imagine living in a place with 2 people per square kilometer?", "summary": "Mongolia is the most sparsely populated country \u2014 2 people per square kilometer", "source": "Mongolia is the most sparsely populated country \u2014 2 people per square kilometer", "sourceUrl": "https://en.wikipedia.org/wiki/Mongolia", "articleUrl": "https://en.wikipedia.org/wiki/Mongolia", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [3, -4, 3, 7, 9, -8, 4, 1, 0, 0, 1, -11, 10, 4, 2, -1, -5, -3, 1, 0, 7, -5, 3, -11, 6, 5, 0, -4, 0, -9, 9, -3, 1, 2, -6, -1, -2, 1, -1, 0, 1, 4, 8, -6, 7, 1, -1, 3, -3, -4, -2, -1, 0, 8, 8, -4, -7, 0, -4, -2, 4, -2, -9, 1, 2, 10, -4, -5, -4, -6, 7, 13, 3, 7, -6, -11, -4, 4, 2, 2, 4, -3, -3, -3, -2, -4, 7, 3, -1, -2, 2, 3, 6, 1, 2, 6, 2, 2, -1, 40, 3, 8, 6, 6, -2, -4, -5, 1, 3, 1, -1, -6, 0, 4, 4, -11, 4, 3, -2, 4, -2, -2, 4, 1, 9, -5, 2, 2, 9, -3, 9, -2, -10, 5, -3, -4, -1, 8, -1, -3, 9, -6, 0, -11, -8, 5, 9, -1, -3, 3, 4, -4, 1, -8, 9, 0, 6, 5, -1, 2, 1, -2, -8, 7, 0, -12, -6, 9, -3, -2, 5, 8, 4, 7, 13, 2, -9, -2, -4, 0, 2, 11, 7, 1, -6, -11, -5, 1, 4, -6, 0, 2, 5, -11, 3, 0, 1, 0, 8, -2, -3, -4, -9, -7, 8, -3, 11, -4, -6, 5, 6, -1, 1, -2, 0, -1, -2, -3, 6, 0, 6, -11, -6, -35, 2, -7, -6, 4, -4, -2, 1, 9, 6, 6, -4, 3, 14, -3, -1, -11, 15, -4, -11, 11, -1, -7, -3, 6, -11, 19, -6, 0, -8, 1, 6, 0, -8, 5, 5, 6, -6, -1, 0, 1, -1, 3, -7, -3, 5, -7, 8, 0, -8, -5, 0, 3, -14, -3, 2, -15, 0, 1, 10, -5, -13, 5, 8, 0, 4, -3, 1, -4, 1, 1, 15, -7, -6, 6, 1, 2, 3, 8, -7, 13, -1, 0, -2, 3, 3, 1, -5, -2, -1, -3, -6, -4, 0, -12, 1, -34, 2, -4, -1, 1, -2, 0, 3, -6, -4, 12, 3, 7, 0, 0, -4, -5, -1, 3, -12, -2, 3, 19, -4, 2, 7, 1, 4, -3, -2, -9, -5, 4, -11, -11, -1, -1, 2, 1, -1, -4, -2, 0, 3, 12, -3, 0, -4, 4, 1, 3, 1, -5, -3, 5, 7, 1, 1, 3, -7, 4, -6, 3, -4, 0], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Flag_of_Mongolia.svg/1280px-Flag_of_Mongolia.svg.png", "explanation": ["Imagine you're planning a road trip across a vast, empty country. You'd be surprised how empty it is, with hardly anyone around to meet along the way.", "In Mongolia, the vast land stretches far and wide, but there's only a handful of people to share it with. This makes it one of the most sparsely populated places on Earth."], "example": "If you walked across Mongolia's entire area, you'd likely not encounter another person.", "whyItMatters": "The idea to remember is that Mongolia's immense size results in extremely low population density."}, {"id": "9fdb5f6a1d1c", "title": "Time in Europe", "slug": "time-in-europe", "headline": "Russia spans 11 time zones \u2014 from Kaliningrad to Kamchatka", "summary": "Russia spans 11 time zones \u2014 from Kaliningrad to Kamchatka", "source": "Russia spans 11 time zones \u2014 from Kaliningrad to Kamchatka", "sourceUrl": "https://en.wikipedia.org/wiki/Time_in_Europe", "articleUrl": "https://en.wikipedia.org/wiki/Time_in_Europe", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -6, 3, 0, 7, -5, -3, 3, 3, 2, 0, -1, -3, 4, -2, -3, -6, -9, -5, -1, 10, -2, 2, -1, 6, 10, 4, -2, -1, -21, -4, 2, -1, 0, -10, -7, -4, 2, 1, 4, 9, 4, 4, -2, -9, -3, -9, 8, -6, -5, -2, 11, 2, 9, 3, -3, 5, 13, 3, -1, 4, -3, -22, 6, -1, 3, 1, 6, -1, 4, -3, 4, -1, 0, 7, -5, -7, 0, -2, -6, 7, 4, -2, -3, 1, -7, -6, -1, -5, 8, -1, 4, 6, -1, -7, -6, 2, 10, 7, 41, -7, -1, -2, 11, 0, -1, -2, -5, -9, -2, -2, -4, 8, -10, 3, -2, 11, -2, 2, 1, -6, -1, 2, 0, 5, 7, 5, 6, 8, 1, 6, 2, -4, 1, 0, -2, -5, 0, -3, -7, -4, -14, 7, -3, -1, 13, -4, 2, -1, 1, 2, 5, -2, -9, 2, 0, 9, -2, -4, -7, -7, 5, 2, 10, 8, -8, -3, 4, 2, -12, -2, -1, 2, -1, 6, -1, -1, 9, -4, 4, 1, -6, -1, 3, -2, -6, -1, -3, 8, -11, -3, -2, 11, 7, -2, 1, -1, 5, 14, -6, 4, -3, -6, -3, 1, 3, 7, 0, 1, 3, 8, -1, 6, -6, 3, -4, -9, -2, -9, 5, 6, -1, 1, -33, 2, -8, -2, 7, -6, -8, -4, 11, 3, 5, 5, -6, -3, 4, 7, -5, 7, 0, -6, 0, 4, -6, -1, -3, -3, 15, -4, -3, -5, 11, 0, 7, -4, 13, 0, 8, 6, 7, 0, 0, 6, 6, 7, 4, -2, -1, -9, -1, -7, -1, -4, -6, -2, -6, 0, -12, -1, -7, 7, -6, -5, -2, 4, 1, 3, -10, 2, -1, 4, 1, 16, -7, -8, -2, -1, 7, 8, 1, 9, 5, -2, -2, 4, 7, -4, 3, 4, 6, 9, 1, -1, 1, -3, 7, 3, -33, 8, 2, -5, 4, -8, -3, 3, -7, -10, 4, 2, 6, 1, -2, 2, 5, 4, 3, -5, 3, 2, 16, -1, 4, -1, 1, 1, 7, 8, -1, 1, 6, -1, -5, 4, 1, 1, -5, -5, -8, 5, 1, -3, 8, -2, -11, -16, -1, -11, -3, -1, 0, -3, 0, 3, 1, -3, 1, -5, 0, -7, -4, -9, -2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Time_zones_of_the_Greater_Europe.svg/1280px-Time_zones_of_the_Greater_Europe.svg.png"}, {"id": "27da5b33c6e7", "title": "Caspian Sea", "slug": "caspian-sea", "headline": "The Caspian Sea is the world's largest inland body of water", "summary": "The Caspian Sea is the world's largest lake \u2014 technically not a sea despite the name", "source": "The Caspian Sea is the world's largest lake \u2014 technically not a sea despite the name", "sourceUrl": "https://en.wikipedia.org/wiki/Caspian_Sea", "articleUrl": "https://en.wikipedia.org/wiki/Caspian_Sea", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [9, -8, 3, 4, 5, -10, 5, 2, 0, 0, 6, -13, 0, 5, -4, 0, 0, 3, -6, -1, 13, -2, 4, -6, 1, 6, -4, 5, -2, -18, -4, -12, -7, 2, -4, -2, -3, -5, -3, 3, 3, 8, -2, 3, -2, 1, -2, 5, 5, -7, 4, 4, 9, 6, 4, -2, 1, 0, 5, -2, 7, -1, -11, 8, 1, 8, 4, 3, -2, -11, 0, 0, 0, 13, 6, -10, -2, 6, 0, -1, 3, -7, -1, -6, 1, -4, 4, 7, -1, -1, -1, -9, 5, -6, 5, 1, -2, 3, -1, 43, -8, 8, -1, 2, 2, 4, -9, 4, -3, 1, -1, 0, 5, -1, -7, -2, 14, -3, -5, -5, -9, -2, 4, 6, 8, 8, 6, 2, 5, 0, 8, -12, -2, -4, -1, 1, 3, -6, 4, -1, -7, -11, 4, -5, -5, 10, 0, 1, -3, 6, -6, 6, 2, -1, -1, 0, -3, 7, 0, -7, -3, 2, 0, 5, 2, -14, -5, -5, -7, 6, -5, 2, 2, 10, 6, -7, -3, 2, 2, 4, 8, 5, -4, 1, 5, 1, -4, -1, -2, -1, 6, 9, 11, -3, 2, -2, 5, -3, 8, -4, 5, 3, -3, 3, 1, 4, 4, 5, -6, 8, 1, -11, -13, -3, -3, -3, 5, -3, -11, 3, 5, -21, -12, -34, 3, -6, -11, 7, -9, -2, -2, -1, 7, 2, 1, -8, 1, -2, 3, 2, 5, -1, -5, -4, 2, -6, 6, 9, -5, 20, 10, 1, 0, 2, -1, 2, -8, -1, -2, 3, -4, -4, -2, 7, -3, -3, 2, 2, 3, 1, 0, 2, -2, 4, 6, -2, -5, -7, 4, -5, -3, -3, -2, -1, 7, 2, 7, -4, -1, -10, 8, 10, -4, -9, 11, 1, 1, 8, 2, 6, 0, 15, -6, -4, -2, 9, 1, 4, 1, -5, -2, -12, 1, 5, 1, 0, -12, -2, 1, -32, 7, 1, -3, -3, -2, -3, 4, -1, 6, 0, -7, -3, 0, -2, -1, 6, 1, 9, 9, 0, 3, 11, -5, 3, 10, -7, 1, -3, 2, -1, 1, 10, -6, -8, 6, 4, 8, 2, -9, -3, 2, 0, 0, 8, -5, 5, -15, -2, 2, -1, -1, -3, 3, -1, 3, -1, -10, -7, -3, 3, 4, 1, -2, 4], "explanation": ["The Caspian Sea's volume is approximately 78,200 km\u00b3, making it a substantial body of water with considerable depth and volume. Its salinity is about 1.2%, which is significantly lower than average seawater, indicating its unique ecological characteristics. Understanding these facts helps appreciate the Caspian Sea's environmental and geographical uniqueness."], "whyItMatters": "Knowing the Caspian Sea's size and location helps us understand its ecological and geographical significance.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Caspian_Sea_from_orbit.jpg/1280px-Caspian_Sea_from_orbit.jpg"}, {"id": "df298a6c7e7c", "title": "Lesotho\u2013South Africa border", "slug": "lesotho-south-africa-border", "headline": "Lesotho is an enclave entirely surrounded by South Africa", "summary": "Lesotho is entirely surrounded by South Africa \u2014 one of only three countries fully inside another", "source": "Lesotho is entirely surrounded by South Africa \u2014 one of only three countries fully inside another", "sourceUrl": "https://en.wikipedia.org/wiki/Lesotho%E2%80%93South_Africa_border", "articleUrl": "https://en.wikipedia.org/wiki/Lesotho%E2%80%93South_Africa_border", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [3, 7, -5, -1, 8, -10, 9, -7, 4, 8, 11, -10, 2, 2, 7, 2, -6, -5, -4, 0, 1, 2, 5, -5, 7, 8, 8, 3, -5, -20, 9, -8, -6, -2, -4, 1, 5, 3, -2, 5, -1, 1, 8, -2, -5, -2, -4, 7, -3, -8, 7, -5, -9, 2, -1, -2, 2, 3, -1, -1, 4, -3, -20, 0, 8, 14, 3, -7, -9, -3, -2, -1, -2, 2, 5, 2, -1, 9, -2, 1, 1, -5, 3, -5, -1, -6, -1, -3, -8, -2, 3, 3, 12, 8, -6, -9, 2, -2, 7, 44, -10, 0, 5, 6, -3, 9, 5, 6, 3, 1, -2, -3, 1, -4, -4, -6, 3, -4, -3, 1, -3, -1, 4, -2, 4, 1, 4, 7, 14, -2, 6, 2, 6, -2, -2, -4, -4, 7, 4, 0, 4, -11, 3, -8, 0, 5, -4, 4, -1, 1, -4, 4, -3, -3, -2, 2, -1, 5, 8, 1, 0, -10, 1, 10, 2, -17, -2, 3, -11, -9, 1, 8, -7, 5, 9, -1, -6, 3, 1, -3, -2, 3, -1, 5, -1, -6, -5, -4, -3, -7, -5, 8, 2, -2, 6, 5, 5, -8, -2, -3, 4, 5, -1, -2, 3, 4, 10, -4, -2, -3, -3, 2, 4, -4, -1, -3, -1, -6, 0, 3, -3, -9, -1, -34, 0, 3, 0, 3, -5, 0, 7, 1, 3, 4, 5, 5, 10, -2, 9, -4, 9, -11, 2, -5, 2, -14, 9, 2, -2, 19, 0, 1, -4, 1, 6, 5, -8, -2, -4, 10, -9, 2, 2, 1, 7, 1, 1, 2, 3, -2, 6, -2, -3, -2, 0, 4, 3, -6, 14, -8, -7, -6, 10, -5, -1, -1, 1, -3, 5, 5, 0, 1, 8, 0, 3, -12, -13, 3, 1, 11, 7, 8, 4, 15, -12, -1, 8, -1, 7, 3, -3, 2, -3, -2, 0, -2, 0, -2, 1, -26, 2, 2, -1, -5, -4, 3, 0, -4, -4, 8, -1, 2, 1, -5, 4, 2, -2, 1, -4, -7, 5, 21, 6, -7, 14, -8, 6, -9, 2, 2, -4, 3, -2, -2, -10, -1, 2, 4, -8, -13, -5, 1, -4, 1, -1, -5, -1, 3, -7, 1, -5, -2, -8, 5, -3, -6, 1, -1, 0, -3, 1, -8, -2, 6], "explanation": ["Lesotho is unique as it is the only country in the world that is completely encircled by another country. This geographical feature makes it a distinctive enclave within South Africa. The border between the two nations stretches for 909 kilometers, forming a complete loop around Lesotho."], "example": "Imagine walking along the border of Lesotho and South Africa; you would never leave Lesotho's territory, as it is entirely surrounded by South Africa.", "whyItMatters": "Understanding Lesotho's unique geographical position helps appreciate its distinct political and cultural identity within the region.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/a/a8/Lt-map.png"}, {"id": "a37e104a2c01", "title": "List of countries and territories by number of land borders", "slug": "list-of-countries-and-territories-by-number-of-land-borders", "headline": "Did you know there's a border shorter than a football field?", "summary": "The shortest international border is between Botswana and Zambia \u2014 about 150 meters", "source": "The shortest international border is between Botswana and Zambia \u2014 about 150 meters", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_countries_and_territories_by_number_of_land_borders", "articleUrl": "https://en.wikipedia.org/wiki/List_of_countries_and_territories_by_number_of_land_borders", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [1, 5, 4, 5, 9, -1, 3, 1, 6, 7, 7, -15, 1, 9, 3, -7, -1, -6, -11, 5, 7, 0, 6, -3, 6, 8, 4, 0, 1, -12, 12, -6, -13, 2, 4, -7, -6, -1, 7, -4, 10, 8, 6, -2, -1, -12, -9, 7, 0, -6, 6, 9, 6, -3, -4, 6, 5, -1, -3, 3, 4, -2, -18, 5, 6, -1, -2, -5, -4, -5, 1, 2, 0, 1, -4, -5, -3, 12, 3, 0, -5, -5, -9, 0, -4, -7, 2, 3, 4, -4, 9, -4, 9, 2, -5, -3, -4, 1, -3, 36, -6, 5, 0, 8, 3, 5, -3, 2, 3, -4, 2, -5, -3, 4, -1, -2, 5, 1, 5, 6, -14, 0, -1, 0, 1, 0, -2, 5, 9, 3, 3, -9, 5, -3, -4, -1, 5, 5, 2, -1, -3, -12, 1, -7, -6, 3, -9, 2, -6, -2, 4, -5, 2, 2, -5, -1, 6, 5, 5, 4, 1, -8, 2, 10, 10, -17, -3, 1, -8, -6, 3, 9, 5, -5, 7, -7, -7, 3, 0, 6, -1, 1, 1, -4, 1, 9, -2, -2, 3, -1, -6, 2, 7, -1, 3, 0, 3, -11, 6, 1, 4, 7, 4, 0, -2, -1, 11, -9, -1, 6, -3, -5, 4, -11, 3, -5, -1, -4, 2, 8, -2, -11, -1, -34, 0, -1, 3, 8, -1, -7, 4, 9, 5, 14, -2, -5, 11, -12, -5, -7, 4, -6, -4, 2, 4, -12, 4, -5, -4, 17, 1, 1, -14, 4, -2, 8, -8, -2, 2, 1, -1, -2, -7, -5, 8, 12, -1, -5, 5, -3, -3, 7, -5, -7, -1, 5, 2, -1, -3, -12, 6, -6, 4, 4, -8, 2, -4, -7, 5, 3, 5, 3, 7, 3, 7, -2, -4, 2, -8, 12, 13, -3, 4, 13, 3, 4, -4, 1, 4, 2, -5, 0, 3, 4, -6, -2, 2, -4, -3, -31, 6, -3, -6, -2, 5, 13, 5, -6, 4, 2, -6, 8, -1, 2, -3, 2, 0, -4, -2, 4, 2, 12, 0, 2, 11, 1, -8, 6, -9, -3, 4, 6, -7, -1, 3, -3, 7, 1, -10, -8, -7, 5, -4, 1, -8, -11, -2, 2, -12, -4, 1, -6, -1, 11, 7, 6, -3, -1, -2, -2, -7, -3, -8, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/80/Countries_By_Land_Border.png/1280px-Countries_By_Land_Border.png", "explanation": ["Imagine you're planning a trip that involves crossing borders; you want to know which border is the shortest.", "Picture Botswana and Zambia as neighbors; they share a tiny strip of land, the shortest border between any two countries."], "example": "The border between Botswana and Zambia is just 150 meters long.", "whyItMatters": "The shortest international border in the world is between Botswana and Zambia."}, {"id": "862931d0c34e", "title": "Beer", "slug": "beer", "headline": "Beer was first brewed around 5,000 BC in Mesopotamia", "summary": "Beer was first brewed around 5,000 BC in Mesopotamia \u2014 some of the oldest recipes survive", "source": "Beer was first brewed around 5,000 BC in Mesopotamia \u2014 some of the oldest recipes survive", "sourceUrl": "https://en.wikipedia.org/wiki/Beer", "articleUrl": "https://en.wikipedia.org/wiki/Beer", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 8, 3, -10, 0, 0, -2, -1, -6, 1, -7, -11, -6, -2, -7, 4, -5, -4, -5, -5, 10, -6, 7, -3, 9, 7, -2, 5, 4, -19, 6, 2, 9, -11, -4, 4, 7, -1, -4, 4, 11, 10, 1, -10, -1, 6, -3, 0, 9, -1, -4, 5, 7, -2, 3, -2, 10, 1, -5, -2, -6, -7, -19, 11, -4, -5, -4, 5, 2, 5, -3, 9, 4, 4, -4, -1, 5, -8, 4, 2, 3, 4, -1, 0, -8, -7, 3, 1, 0, 7, 0, 0, 0, 5, -4, 3, 2, -1, 11, 43, -7, 4, -2, 3, 9, 0, -2, 1, 2, 6, -5, 1, 7, 1, 6, -3, 6, -8, 1, 8, -1, 4, 1, 0, -1, 4, -2, 4, -1, -6, 6, -5, 2, -6, 0, 4, -2, -2, 5, -12, -10, -1, 6, -9, -4, -3, 3, -3, -7, -7, 4, -5, 1, -2, 12, -2, 6, 4, -2, -6, 1, -3, -1, -3, 9, -3, 1, -3, 8, 4, 5, 8, 6, 5, -1, 4, -2, 1, -5, 4, 14, 0, 3, 7, 4, -8, -11, 2, -1, 11, 3, 1, -1, 5, 1, 1, -3, -1, 1, 1, -7, -1, -4, -2, 4, 2, 3, 0, 8, 3, -4, 5, -1, -8, 6, -5, 2, -2, -6, -3, 3, -17, -1, -34, 0, -2, -5, 11, 0, -6, -6, 4, 2, 1, -1, 0, 6, -4, 0, 9, -3, 4, 1, 4, -1, -1, -5, -2, -7, 19, -4, 3, -3, 1, 1, -1, -16, 2, 2, -3, -4, -2, -1, -10, 4, 1, -6, -5, 4, 2, -7, -3, -7, 6, 0, 1, 3, -3, -12, -14, 12, -2, 7, -1, -3, -3, 2, -5, 1, -9, -1, 8, 5, 1, 9, -5, -12, 9, 3, 3, -2, 4, 0, -3, -14, 15, -6, 3, 10, 4, 6, -1, 3, 4, -5, -7, -3, 6, -1, -28, 10, 7, -3, 1, -4, 3, 7, 0, -3, 9, -1, 8, -4, 0, -4, 0, -2, -7, -1, 1, 9, 7, 1, 0, -2, -4, 2, -6, 14, 2, 2, 19, -4, 2, 9, 1, -9, -1, -1, -11, 2, -7, -2, -2, 0, -4, -9, -1, -3, 2, -3, 0, 6, 2, -3, -6, -2, -8, -3, -1, 0, 0, 2, -3], "explanation": ["Modern beer is typically brewed with hops, which add bitterness and other flavors and act as a natural preservative and stabilizer. The strength of contemporary beer usually ranges between 4% to 6% alcohol by volume (ABV). This evolution in brewing techniques and ingredients reflects advancements in the industry while maintaining the core principles of beer production."], "whyItMatters": "Understanding the ancient origins of beer provides insight into its historical and cultural significance, as well as the evolution of brewing techniques and ingredients over time.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/Hacker-Pschorr_Oktoberfest_Girl_Remix.jpg/1280px-Hacker-Pschorr_Oktoberfest_Girl_Remix.jpg"}, {"id": "5bbd43bd07a1", "title": "List of poisonous plants", "slug": "list-of-poisonous-plants", "headline": "Tomatoes were considered poisonous in Europe for 200 years \u2014 they're in the nightshade family", "summary": "Tomatoes were considered poisonous in Europe for 200 years \u2014 they're in the nightshade family", "source": "Tomatoes were considered poisonous in Europe for 200 years \u2014 they're in the nightshade family", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_poisonous_plants", "articleUrl": "https://en.wikipedia.org/wiki/List_of_poisonous_plants", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 7, 0, 4, 8, -4, 8, 2, -4, 2, 3, -6, -2, 7, -8, 1, -6, 3, -2, -4, 7, 2, 13, -1, 7, 13, 3, 5, -2, -23, 0, 2, -4, -4, -1, 0, -2, -3, 5, 5, 7, 4, 2, -2, -5, 5, 0, 5, 4, 1, 3, 1, 0, 1, -2, 0, 8, 4, -6, 10, 2, -2, -15, -1, 0, 5, -9, 0, -1, -1, -10, 1, -3, 1, 1, 0, 2, -6, -2, -2, 1, -3, 3, -9, 1, 2, -9, 4, 4, 5, -1, -5, 2, -3, -5, 0, 1, 0, -2, 44, -3, -3, -9, 6, -1, 4, -5, -3, 5, 11, -4, -1, 3, -2, 2, -8, 7, -4, 4, 7, -3, 1, 7, 5, 8, 3, 0, 6, 10, 1, 6, 0, -3, 3, 3, 6, -3, -2, 1, -15, -7, -21, 6, -2, -1, 0, 4, 5, -4, 9, 1, 3, 2, 3, -5, 7, 5, -1, 11, -5, -1, 2, 2, 5, 9, -8, -7, 6, 5, -4, 14, 4, 0, 0, -8, 1, -3, 6, 0, 2, 9, 4, 2, 6, 2, -2, -8, 3, 5, 6, -9, -4, -3, 7, -4, -5, -2, 7, 5, -2, -1, -8, -6, 7, 3, -2, 6, -5, 0, -6, -3, -1, -1, -3, -4, 4, 3, 4, 1, 0, 5, -12, -4, -29, -5, 2, 2, 2, 0, -4, -11, 1, -6, -5, 4, -4, -4, -5, 2, 6, -7, -2, -1, -6, -9, -8, -3, 3, -6, 21, 0, -11, -4, -1, 4, 2, -7, -3, -2, 0, -3, -2, 0, 1, -4, -5, 2, -1, 1, 4, 1, 11, 0, 2, 9, 9, 10, -2, -4, -14, 6, -1, 8, -9, 3, 2, -9, 4, -1, 1, -8, 4, 1, -4, 24, -17, -22, 2, 7, -2, -3, 1, 3, 7, -3, 2, 4, -4, 0, -3, -10, 3, 1, 4, -7, -11, 8, 1, 2, -29, 1, 9, 2, 4, -5, 2, 4, 4, -9, 8, -2, 7, 1, -1, -2, 4, 3, -5, -1, 7, 1, 14, -2, -3, 3, 1, 2, -4, 8, -2, 6, 1, -6, 1, -1, -2, -3, -4, -1, -7, 0, -8, -8, 4, -4, -1, -14, 0, -4, -2, -2, 0, 0, -4, -3, -11, 4, -2, 7, 2, 4, -1, 9, 2], "explanation": ["The misconception about tomatoes' toxicity eventually faded as people learned more about the plant and its benefits. This example illustrates how cultural beliefs can persist even when they are not based on scientific evidence."], "whyItMatters": "Understanding the historical misconceptions about tomatoes helps us appreciate the evolution of botanical knowledge and dispels myths that can affect dietary choices.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Cattle_poison.jpg/1280px-Cattle_poison.jpg"}, {"id": "4c3d26abfca7", "title": "Culture of Ethiopia", "slug": "culture-of-ethiopia", "headline": "Did you know coffee's discovery was a happy accident involving dancing goats?", "summary": "Coffee was discovered in Ethiopia when a goat herder noticed his goats dancing after eating berries", "source": "Coffee was discovered in Ethiopia when a goat herder noticed his goats dancing after eating berries", "sourceUrl": "https://en.wikipedia.org/wiki/Culture_of_Ethiopia", "articleUrl": "https://en.wikipedia.org/wiki/Culture_of_Ethiopia", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [0, -2, 3, 5, 13, -4, 3, 2, 0, 10, 5, -7, -1, -3, -1, -2, -8, -4, -8, -5, 4, -3, -3, -10, 2, 7, 0, 2, -4, -16, 2, -1, -3, -4, -10, 12, 0, -1, -1, 5, 9, -3, -4, -5, -1, -1, 0, 7, -3, -3, -9, -7, -3, -1, 7, 6, 12, 2, -4, -2, 8, -5, -19, 2, 2, -8, -8, -5, 8, 4, -4, 0, 3, 1, 2, 1, 10, -3, -2, 3, -4, 1, -6, 0, -3, -9, 7, 0, 0, 1, 0, 1, 2, 0, -5, 2, 1, 2, 2, 50, -7, 3, 0, 2, 4, 5, 1, 1, 8, 5, 9, -1, 8, 7, 1, 4, 4, 2, 1, -1, -9, 3, 8, -8, -2, -5, -3, 3, 2, -6, 1, -4, 4, 1, 3, -1, 4, -5, 5, 0, -2, -4, 0, -17, -7, 4, 9, 3, -6, -3, -1, 0, -3, 2, 5, 2, 7, 2, -1, 1, 0, -10, -2, 4, 5, -15, -1, -4, 1, 2, 1, 10, -3, 3, 0, -5, -2, 4, -3, 1, 6, -4, 5, 5, -3, -3, -7, -1, 4, -2, 1, 1, -4, 0, 6, -8, 6, 2, 1, 3, -13, -6, -4, -3, 1, -1, -1, -3, 1, -7, 9, 3, -2, -1, -8, 2, -4, 9, -2, -6, 4, -21, -1, -36, -9, 1, -4, 0, -3, -5, -11, 12, 2, 1, 8, -2, 6, 2, 4, 0, -6, -2, 4, 0, 3, 1, -2, -5, -9, 18, 19, 1, -5, -5, 4, 0, -15, -2, 6, 2, -6, -2, 4, -1, 1, -2, 0, 3, 1, 2, -2, 2, 1, 9, -1, 4, 3, -8, -5, -5, -4, -3, -3, -3, -4, 9, 1, 5, 8, -4, 1, 7, 6, 4, 20, -3, -8, 8, 1, 7, -13, -4, 0, 10, -6, 1, 4, 0, 4, -2, -7, 1, -2, 4, -7, -3, -7, 7, 8, -30, 4, -2, -1, -4, 3, 4, -8, 7, -2, 8, -7, 10, -1, 6, 3, 4, 8, -6, 0, 2, 10, 11, 3, -8, 6, 4, 0, -1, 1, 3, 0, 9, -3, 4, 3, 2, -1, -1, -7, -3, 3, -5, -2, 1, -9, -2, -8, 2, -2, 8, -3, -3, 7, 1, 5, -3, 0, 1, -4, 4, 0, 5, 0, -2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/9/9d/Bole_Medahane_Alem%2C_Addis_Ababa%2C_Ethiopia_%2815605162761%29.jpg", "explanation": ["Imagine you're a farmer noticing your goats acting strangely after munching on some wild berries. You're puzzled by their unusual behavior.", "The goats' dancing is a clue that the berries contain caffeine, which excited them. This observation led to the discovery of coffee."], "example": "The goats' unusual behavior after eating the berries was the first clue that something in the berries was stimulating their nervous system.", "whyItMatters": "The core insight is that observing animals' reactions can lead to significant discoveries, like coffee."}, {"id": "9160017f58c4", "title": "Hot chocolate", "slug": "hot-chocolate", "headline": "Chocolate was a bitter drink in Mesoamerica for 3,000 years before Europeans added sugar", "summary": "Chocolate was a bitter drink in Mesoamerica for 3,000 years before Europeans added sugar", "source": "Chocolate was a bitter drink in Mesoamerica for 3,000 years before Europeans added sugar", "sourceUrl": "https://en.wikipedia.org/wiki/Hot_chocolate", "articleUrl": "https://en.wikipedia.org/wiki/Hot_chocolate", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-2, 2, 6, 7, 0, -3, -2, 1, -7, 2, 3, -8, -6, -3, 0, 2, -4, -3, -12, -4, 7, -4, 3, 4, 1, 7, 2, 7, 2, -22, 2, -1, 0, -8, -5, -1, -2, 0, -7, 10, 8, 4, 1, -5, -6, 4, -3, 7, 6, 2, 1, 0, 2, 5, 1, 13, 5, 0, 0, -1, 4, 2, -20, 10, 8, 2, -12, 2, 0, 1, -10, 2, 1, 3, -1, 3, 6, 2, -3, -1, 9, 4, 2, -5, -1, -17, 2, 0, -1, -4, 1, -6, 0, 5, -9, 3, -4, 4, 8, 48, -1, 2, -10, -1, 2, 2, -5, 3, 4, 10, 3, 2, 1, -2, -3, -2, 7, -7, 3, 5, -5, 2, 3, -3, 6, 2, 8, 5, 5, -4, 4, 3, 5, 4, 0, 1, -1, -1, 3, -5, -14, -9, 1, -4, -9, -2, 13, -1, -5, -2, 0, -4, -1, 11, -3, -2, 1, 0, -1, 4, 4, -6, 4, -2, 12, -2, -3, 2, 10, -3, 12, 6, -6, 1, 7, 2, 2, 3, -2, -1, 5, 2, 8, 8, 3, -1, -3, -1, 3, 7, 3, 0, -2, 2, 2, 6, 1, -2, -4, -1, -8, -5, -5, -5, 10, 1, 6, 0, 2, -4, -6, 5, 3, -3, 3, 0, 8, -3, -2, 6, 0, -10, -5, -33, -4, 4, -4, 10, -2, -1, -8, 6, -2, 0, 0, -5, 8, -7, 3, 8, 0, -2, 5, -2, -2, 2, -3, 2, -2, 21, 2, -13, -5, 1, 3, -1, -9, 2, 0, 3, -6, 2, 2, -7, -3, -2, 3, 0, -1, 2, 1, 3, -2, 3, 8, -4, 2, -4, -5, -12, 0, 1, 2, -7, -1, 2, -2, -1, 1, 1, -10, 1, 7, 2, 18, -8, -14, 6, 3, 0, -5, -8, 4, 2, -5, 8, 0, 0, 4, 0, -6, 2, 2, 8, -4, -6, -8, 0, 5, -33, 9, 5, -4, 8, 0, 7, -4, 2, 0, 7, -3, 6, -4, -1, -5, 0, 1, -2, -11, 0, -3, 20, 3, -5, 4, 1, 0, -5, 3, -2, 7, 10, -4, 5, 4, -5, -2, -5, -1, -10, 4, -6, -5, 3, -5, -2, -13, 2, 3, -1, -9, -1, 3, -6, -5, -14, -1, -2, -8, -1, 6, -1, 6, -3], "explanation": ["The medicinal use of hot chocolate in the 19th century highlights its historical significance beyond mere consumption. It was used to treat ailments such as liver and stomach diseases, indicating its perceived health benefits. This aspect of chocolate's history underscores its importance in various cultures and its evolution over time."], "whyItMatters": "Understanding chocolate's bitter origins and the subsequent addition of sugar provides insight into its cultural and historical significance. This knowledge helps us appreciate the transformation of chocolate from a medicinal beverage to a globally beloved sweet treat.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/After_The_St._Patrick%27s_Parade_Late_Lunch_%40_Lemon%2C_Dawson_Street%2C_Dublin%2C_Rep._Of_Ireland_A_Fine_Tradition%21_%286992614913%29.jpg/1280px-After_The_St._Patrick%27s_Parade_Late_Lunch_%40_Lemon%2C_Dawson_Street%2C_Dublin%2C_Rep._Of_Ireland_A_Fine_Tradition%21_%286992614913%29.jpg"}, {"id": "26806e5827c3", "title": "List of The Whitest Kids U' Know episodes", "slug": "list-of-the-whitest-kids-u-know-episodes", "headline": "Ever wondered why sandwiches are called sandwiches?", "summary": "The sandwich was named after the Earl of Sandwich who wanted to eat without leaving the card table", "source": "The sandwich was named after the Earl of Sandwich who wanted to eat without leaving the card table", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_The_Whitest_Kids_U%27_Know_episodes", "articleUrl": "https://en.wikipedia.org/wiki/List_of_The_Whitest_Kids_U%27_Know_episodes", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [2, 6, -5, -3, -3, -2, 17, -1, -1, -4, 0, -9, 2, -2, 5, 0, -5, 1, -4, -7, 4, -8, -6, 0, 6, 2, 5, -6, -7, -14, 9, -5, 4, -7, -7, -6, 7, 1, -6, 2, 4, 2, 7, -3, 8, 1, 1, -6, 4, 3, -7, 4, 2, -9, 1, 10, 11, -6, 3, -1, -2, 1, -14, 9, -2, 3, -6, 2, -3, 10, -2, 2, -1, 7, 2, -5, -2, -3, 2, 0, -4, -1, 0, 0, -12, -5, 0, -9, -1, -2, 2, 2, 3, 3, -1, -1, -6, 0, -7, 40, -14, 0, -3, -5, 0, -1, 0, 4, -3, -2, 5, 7, 5, 5, 1, 0, 7, -6, 0, -6, -8, 14, 3, 0, -7, 11, 5, 9, -3, -2, 1, -9, 7, 2, 7, 5, 7, -4, 1, -6, -7, -6, -6, -5, 3, -1, -4, 1, 1, 10, 3, -10, -4, 2, 2, -3, 5, 9, 3, 1, 0, -3, 1, 5, -6, -15, -10, 0, -8, -4, 10, 11, -9, 8, 9, 2, -4, -11, 3, 0, 10, -4, -8, -7, 4, 1, -2, -7, 2, 12, 6, 6, 4, 1, -6, -2, -5, 10, 3, 3, -7, 1, 1, 6, 4, -3, 5, -4, 7, 0, 6, 1, -6, 9, 2, 3, 6, -1, 0, -7, 3, -13, -6, -28, -1, -13, 0, -1, -11, -1, 5, -2, -2, 2, -1, -4, -3, -8, 7, 5, -6, -6, 9, 7, 8, -3, -4, 4, 4, 17, 6, 5, 1, 2, 0, 3, -14, -6, -4, -2, -13, 2, -4, -12, -4, -2, -8, 1, 5, 1, -1, 3, 8, -1, -5, 1, 5, 1, -2, 4, -5, -7, 8, -10, 2, -2, 9, 2, 6, -12, 1, -4, -5, -14, 4, 2, -14, -6, 0, 5, -5, -3, -7, -12, 6, 10, 8, -1, 3, -1, 3, 2, -4, 1, 6, -1, -8, 8, 5, -22, 13, -2, 1, 10, 10, -6, 6, -1, 1, 13, -7, 6, -2, -2, 6, 0, 6, -6, 8, 5, 6, 17, -3, 4, -5, 8, 3, -7, 6, -4, -3, 9, -2, 1, -3, 1, 3, -3, -7, -3, 2, -2, -1, 6, 9, 7, 1, 1, 0, 0, -4, -5, 3, 1, -11, -9, 2, 1, 9, -1, 0, 8, 9, 6], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Metal_movable_type.jpg/1280px-Metal_movable_type.jpg", "imageLicense": "CC BY 2.5", "imageArtist": "Willi Heidelbach", "explanation": ["Imagine you're stuck at a card table, hungry, and don't want to leave your game. You need a quick, convenient meal.", "The sandwich was invented as a portable, non-messy meal for someone who couldn't leave the table. The technical term is \"sandwich.\""], "example": "John, a card player, invents a sandwich to eat while still focused on his game.", "whyItMatters": "The sandwich's name comes from Earl of Sandwich, who wanted a convenient meal without leaving the table."}, {"id": "4f8dcd341689", "title": "Champagne", "slug": "champagne", "headline": "Did you know champagne's bubbly surprise was once a flaw?", "summary": "Champagne was accidentally invented \u2014 monks originally considered the bubbles a flaw", "source": "Champagne was accidentally invented \u2014 monks originally considered the bubbles a flaw", "sourceUrl": "https://en.wikipedia.org/wiki/Champagne", "articleUrl": "https://en.wikipedia.org/wiki/Champagne", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 1, -3, -3, 2, -6, 8, 3, 0, -5, -8, -2, -4, 0, 3, 2, -1, -2, -6, 3, 0, -8, -5, 4, -1, 1, 0, -3, 3, -17, 2, -2, 1, -4, 2, 0, -1, -4, 7, 4, 7, -3, -3, 0, 2, 3, 6, 17, 4, -8, 2, -7, 2, -5, 0, 2, -2, 8, -5, 5, -1, -2, -15, 8, -1, 1, -8, -6, -1, 9, 1, 3, 5, 1, -6, -1, 1, -1, -11, 11, 10, -6, -4, -2, -6, -7, 1, 2, 7, -2, -1, 2, 0, 4, -4, 6, 3, 4, 0, 41, -5, 7, 3, 0, 1, -1, -7, -4, 2, 2, 11, 2, 8, -1, -1, -1, 1, -7, -8, -6, -2, 13, 9, 0, -12, -5, -3, 5, -4, -6, 0, 0, 3, -3, 3, -1, 1, -1, 14, -5, -3, -2, 2, 1, -4, -1, 6, -2, 5, 2, -9, -4, -10, 1, 3, -2, 4, 16, -4, -2, 3, -4, -10, 7, -3, -11, 2, 0, 7, -7, 0, 3, -8, 2, 3, 8, -2, 0, 2, 4, 3, 0, 4, 4, 0, -9, -5, 0, 7, 4, -7, 1, -3, 5, 2, -3, 5, 0, -1, 0, -17, -5, 0, 0, 8, 8, 5, -4, -2, 0, 4, -1, -10, 3, -1, 1, 1, 0, -3, -13, 11, -10, -6, -39, -6, -1, -2, 8, 0, 9, -4, 1, -2, -5, -2, -3, -8, 4, -4, 10, -2, -2, -6, -2, 5, 0, -8, -9, -2, 23, 6, -5, 8, 4, -4, 5, -5, 3, 2, 8, -1, -7, -1, -1, -7, -3, -6, -5, 0, -1, 3, -3, 10, 10, 7, -6, 4, 4, -2, -7, 3, 3, -3, 2, 3, 6, 2, -5, 6, 3, -6, 15, 6, -4, 21, -1, -13, 7, -3, 2, -16, -3, 0, 4, -2, 1, 0, 1, -2, -11, -2, -1, -7, -4, -2, 1, 1, 7, 3, -31, -4, 8, 2, 5, 9, 0, 0, 0, 0, -4, -10, 2, 1, 0, -7, -2, -1, 3, -1, 2, 9, 17, -1, -7, 2, 6, 0, -1, 5, -1, 2, 3, 1, 1, 2, -7, 1, 3, -2, 0, 0, -8, 0, 13, -2, -6, -3, 10, 3, 2, -4, 0, 12, -4, 5, -4, 0, 6, 5, 2, 1, 11, 9, -1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/Glass_of_champagne.jpg/1280px-Glass_of_champagne.jpg", "explanation": ["Imagine pouring a glass of wine, expecting a smooth drink, but instead, you get a fizzy mess.", "Monks in Champagne accidentally created bubbles when they pressed grapes too tightly, turning a flaw into a signature feature."], "example": "Pressing grapes too hard caused unintended carbonation, leading to the sparkling wine we know as champagne.", "whyItMatters": "The accidental carbonation turned a mistake into champagne's defining characteristic."}, {"id": "b9a73cd2586a", "title": "Sushi", "slug": "sushi", "headline": "Did you know sushi's rice was once thrown away?", "summary": "Sushi originally meant fermented fish preserved in rice \u2014 the rice was discarded, not eaten", "source": "Sushi originally meant fermented fish preserved in rice \u2014 the rice was discarded, not eaten", "sourceUrl": "https://en.wikipedia.org/wiki/Sushi", "articleUrl": "https://en.wikipedia.org/wiki/Sushi", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [3, 3, 2, 2, 6, -1, 5, -1, -4, -1, 5, -12, 2, 0, 0, -3, -3, 2, -6, -9, 8, -5, -6, -7, 9, 8, -7, 3, -2, -15, 0, 1, 2, -6, -1, 5, 0, -11, 1, 8, 6, 1, 3, 1, -1, 2, -1, -2, 10, 0, -2, 9, 8, 2, 5, 1, 9, -1, 1, 2, 2, 3, -10, 0, 1, -1, -1, 3, 1, 5, -9, 2, -3, 8, 0, -2, 8, 3, -10, 7, 0, 1, 3, -2, -13, 1, 0, -2, 2, -1, -5, -8, 9, 0, -4, 1, -5, 7, 0, 48, -3, 5, 10, -4, 2, -4, -1, 4, 4, 0, -8, 3, -1, 7, 11, 5, 9, -5, -2, -5, -6, 4, 8, -4, -4, -5, -5, 4, -1, -10, 2, -15, -2, -4, 5, 6, 10, -6, -3, -6, -2, -10, 2, -8, -6, 3, 7, -5, -1, 10, -1, 3, -3, -3, 12, -4, 3, 7, -1, 1, -4, -7, -11, 1, 7, 1, -10, 1, 3, -5, 3, 4, -2, 1, 2, 4, 5, 1, -6, 1, 8, -2, -5, 7, 4, -9, -10, -1, 1, 6, 0, -2, 1, -2, -1, 0, 3, -1, 6, -5, -5, -3, -3, 2, -3, -1, 9, -3, 0, 10, -3, 6, -6, 10, 2, -3, 4, -3, -6, -9, 4, -17, -3, -31, -5, -3, -5, 2, -4, -8, -1, 5, 1, -12, 3, -4, 1, 3, 1, 10, -5, 1, 1, -1, 4, 4, 1, 13, -2, 19, 11, 4, -3, -3, 5, -4, -11, -5, -2, -4, -10, -4, -2, -5, 1, -3, -7, 3, -6, 3, -6, 5, 14, -4, -4, 1, 9, -4, 11, -4, 5, 9, -1, -2, 8, -1, 0, 2, -2, -7, 1, 3, -5, -8, 13, 0, -12, 4, 4, -3, -15, -1, -3, 4, 4, 16, 2, 3, 7, -1, -7, -1, 6, 4, 5, -6, -5, 6, 1, -25, 12, 6, -1, 1, 1, -1, 4, -3, 12, -2, 1, 8, -14, 0, -7, 9, -1, -2, -4, -4, -2, 12, 1, -10, -6, 3, 0, 1, 14, 1, 1, 8, -5, -4, 2, -3, -3, 1, -6, -6, 2, -10, 0, 10, 1, 2, -10, -1, -2, 1, -2, 5, -1, 1, 0, -4, -4, -7, 4, 5, 4, 3, 1, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Sushi_platter.jpg/1280px-Sushi_platter.jpg", "explanation": ["Imagine you're at a sushi restaurant, and you notice the rice isn't eaten with your meal. Why is that?", "Sushi's rice was originally used to preserve fish. The rice absorbed the fish's flavor, leaving behind a tasty remnant to eat."], "example": "You pick up a piece of nigiri-zushi, and the rice is flavorful, yet there's no rice on your plate.", "whyItMatters": "The rice in sushi absorbs the fish's flavor, making it a tasty leftover."}, {"id": "591b74fb6b9a", "title": "Ketchup originated in China as a fermented fish sauce called k\u00ea-tsiap", "slug": "ketchup-originated-in-china-as-a-fermented-fish-sauce-called-k-tsiap", "headline": "Did you know ketchup started as a fermented fish sauce?", "summary": "Ketchup originated in China as a fermented fish sauce called k\u00ea-tsiap", "source": "Ketchup originated in China as a fermented fish sauce called k\u00ea-tsiap", "sourceUrl": "https://en.wikipedia.org/wiki/Ketchup_chips", "articleUrl": "https://en.wikipedia.org/wiki/Ketchup_chips", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-6, 3, 3, 1, 1, -2, 10, 3, -7, -7, 4, -11, -4, -2, 0, -1, 3, -6, -8, -13, 2, -2, -3, -2, 11, 8, 4, 6, 4, -15, 0, -2, 8, -2, -6, -6, -1, -2, 4, 1, 6, 4, 1, -4, 1, 6, -2, 9, 8, 1, 1, 4, 5, -2, 5, 7, 3, -6, 0, 0, -3, 2, -14, 5, -2, 4, 2, 5, 2, -3, -11, 1, -2, 4, 1, 0, 5, 0, -2, 1, -1, 5, 3, -2, -7, 0, 9, 0, 4, 0, 1, -2, 3, -6, -5, -6, -2, 14, 1, 43, -1, -3, -7, -5, 2, -2, -3, 14, 7, -3, -4, -2, -9, -1, 3, -11, 8, -7, 1, 5, 0, 12, -4, -1, 1, -3, -2, 10, 7, -13, 4, -5, 7, 0, -1, -1, 4, 0, -11, -1, -3, 0, -3, -11, -5, -3, -7, -2, -6, 3, 7, -6, -4, 3, 11, -8, -1, 3, 6, -2, -5, -3, 0, 2, 5, -15, -6, 2, 3, -4, 5, 7, -8, 7, -4, 0, -8, 2, 0, -4, 10, 0, -5, -5, 5, -12, -5, 5, -7, 5, -9, 0, 2, 2, 1, -2, -1, 0, 12, -12, -4, -5, -5, 6, -3, -4, 7, 0, -1, 3, 0, 6, -7, 7, 4, -1, 1, 8, -5, 1, 7, -18, 1, -32, 2, 0, 5, 1, -11, -4, -5, 5, 9, -2, 9, 1, 2, 1, 7, 7, 3, 9, 4, 1, -2, 1, -4, 1, -6, 12, 12, 9, -3, 0, 4, -4, -13, 5, -3, 6, -10, -1, -1, -3, -3, -6, -5, 2, -9, 3, 1, 4, 3, -1, -4, 2, 4, -5, -1, -3, 3, -1, -5, -1, 7, -3, 6, -1, 4, -2, 4, 3, 3, -5, 15, -4, -10, -3, 5, 0, -13, 11, -3, 4, -1, 8, 1, -3, 6, 3, -2, 0, 2, 0, 7, -6, 4, 7, 0, -30, 12, 5, 3, -1, 2, 3, 2, 6, -3, 0, -10, 9, 2, 11, -5, 8, 2, 8, 9, -1, 0, 16, 0, 0, -7, 3, -1, 1, 8, -2, -2, 6, -2, 1, 8, -4, -1, -8, 1, -17, -3, -7, 0, 4, -6, -6, -15, 0, 3, 2, -6, 4, 0, 1, 1, -2, -1, -14, 5, 8, -5, -6, 6, 5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/1/15/Temple_Scroll.png", "imageLicense": "Public domain", "imageArtist": "Israel Museum", "explanation": ["Imagine you're at a global food festival, trying different snacks from around the world. You encounter a unique snack that combines the tangy-sweet taste of ketchup with the crunch of potato chips, but it doesn't quite taste like traditional ketchup.", "Ketchup chips are a snack that blends tomato, sugar, and vinegar to mimic the tangy-sweet flavor of ketchup, but with a crunchy potato chip texture."], "example": "At the festival, you bite into a ketchup chip and experience a tangy-sweet flavor with a satisfying crunch.", "whyItMatters": "Ketchup chips offer a unique snack combining the familiar taste of ketchup with the enjoyable texture of potato chips."}, {"id": "2665787405c6", "title": "Croissants are not French", "slug": "croissants-are-not-french", "headline": "Croissants originated in Vienna, not France, as a celebration of defeating the Ottoman siege", "summary": "Croissants are not French \u2014 they were invented in Vienna to celebrate defeating the Ottoman siege", "source": "Croissants are not French \u2014 they were invented in Vienna to celebrate defeating the Ottoman siege", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, 5, -4, -6, -2, 2, 0, 6, -1, 1, 1, -9, -10, 0, -2, -8, -4, 0, -5, -8, -1, -6, 2, 0, -4, 8, 2, 2, 4, -18, -3, 1, -6, -6, 3, -4, 5, 2, 0, 6, 15, -3, 3, -7, 3, 2, -3, 8, -2, -3, 5, 10, 4, -10, 1, 4, 4, 3, 8, -3, -1, 2, -20, 11, -6, -2, -1, -1, -4, 6, -3, 3, 4, 0, -1, -5, 3, -5, -8, -2, 11, -4, -4, -1, -5, -9, 2, -2, 8, -2, 0, -8, 7, 0, -2, -1, -6, -2, 5, 46, -9, -1, -4, -2, 7, 0, -7, -2, 2, 4, 2, -4, 4, 1, -3, -5, 10, -9, -2, 5, 2, 1, 0, -5, 0, 3, -9, 9, 1, -8, -1, -1, 5, -4, 3, 6, 3, 0, 1, -10, 1, -5, 6, -1, 0, -2, 8, 2, 3, 1, -1, 1, -7, -4, -1, 1, 0, 12, -1, -3, 3, -4, -5, 6, -1, -13, -1, 8, 11, -9, 5, -1, -5, 11, 8, 1, -4, 4, 3, 7, 7, -3, -2, 1, -1, -2, -2, -2, 5, 8, 3, 6, 1, 0, 1, 3, 2, 6, 8, 0, -1, -3, -1, -4, -2, 0, 14, -6, 1, 1, -2, 4, -3, -3, -3, 6, 5, -2, -8, -7, 2, -12, -2, -35, -2, 6, -4, 9, 4, 2, -3, 1, -2, 1, -3, 0, 10, 6, 6, 6, -6, 2, -8, 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"headline": "Chili peppers are native to the Americas", "summary": "Chili peppers are native to the Americas \u2014 they didn't exist in Asian cuisine before Columbus", "source": "Chili peppers are native to the Americas \u2014 they didn't exist in Asian cuisine before Columbus", "sourceUrl": "https://en.wikipedia.org/wiki/Red_Hot_Chili_Peppers", "articleUrl": "https://en.wikipedia.org/wiki/Red_Hot_Chili_Peppers", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-1, -3, 5, -4, 6, -3, 5, -5, -5, -8, 1, -1, -3, -3, -4, -4, -5, 1, -5, -8, -2, -3, 0, 1, 0, 7, -4, 6, -3, -18, 1, 5, -3, -2, -7, -1, 0, -7, -1, 7, 4, 7, 6, -6, -9, 10, -6, 5, 5, 3, 6, 7, 1, 2, 6, 16, 6, -1, 3, 2, -1, 5, -19, 8, -2, 2, -6, 7, -6, -9, -3, -1, -2, 2, -1, 0, 2, 5, -8, -2, 7, -2, -6, -11, -2, -7, 1, -1, -7, 1, 2, -6, 3, -4, -5, 4, -4, 3, -1, 38, 1, -3, -7, 2, -4, 2, -6, -3, 3, 9, 3, 2, -9, -1, 1, -16, 13, 1, 10, -2, -5, 1, 4, -2, -1, -1, -7, 4, 8, -1, 7, -4, -2, -9, -2, 3, 7, -5, 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world, becoming a staple in many Asian cuisines. This integration into Asian cooking traditions highlights the transformative impact of Columbus's voyages on global culinary practices."], "whyItMatters": "Understanding the origin and spread of chili peppers helps explain their presence in Asian cuisine today.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/1/14/RHCP_Live_in_London_26_June_2022.jpg/1280px-RHCP_Live_in_London_26_June_2022.jpg"}, {"id": "28eec704de28", "title": "History of the Hindu\u2013Arabic numeral system", "slug": "history-of-the-hindu-arabic-numeral-system", "headline": "Why did ancient scholars invent a new way to count?", "summary": "The word 'algorithm' comes from al-Khwarizmi, a 9th-century Persian mathematician", "source": "The word 'algorithm' comes from al-Khwarizmi, a 9th-century Persian mathematician", "sourceUrl": "https://en.wikipedia.org/wiki/History_of_the_Hindu%E2%80%93Arabic_numeral_system", "articleUrl": "https://en.wikipedia.org/wiki/History_of_the_Hindu%E2%80%93Arabic_numeral_system", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-7, 8, -1, -1, -12, -6, 6, 6, 5, 1, -5, 1, 3, 8, 1, -4, -10, 6, -2, -7, 20, -4, -1, -6, -4, 11, -3, -9, 0, -19, -5, -4, 12, -1, -1, 3, -7, 7, -12, 11, -1, 3, 2, 1, 0, 2, -3, 6, -6, -4, -5, 2, 2, 4, 7, 2, 6, 4, 0, 0, 4, 1, -19, 7, -2, -4, -1, -12, -2, 11, 2, 3, 8, 4, 1, -1, -6, -4, 2, -1, 3, -4, -3, -1, -8, -3, -3, -3, 3, 1, 2, 4, -3, -3, 3, -6, -4, 8, -3, 42, -1, 4, -1, -3, 2, -4, -6, -11, -7, -4, -3, -3, 7, -1, 1, -2, 2, 2, 4, 3, -4, -2, 3, -2, 3, 4, -12, 12, -5, 3, 7, -2, -10, -3, 3, 2, 2, 2, 2, -2, -6, 6, 1, 1, 2, 11, 6, 1, 2, -5, -1, -7, -6, -8, 0, 0, 8, 8, -1, 4, -6, 5, -7, 14, 4, -7, 4, -4, -2, -3, 9, 6, -6, 4, 4, -1, -2, 0, 3, -2, 13, -3, -9, 1, -2, -3, 2, 1, 4, 0, 3, 11, -3, -2, -7, -5, -1, 7, -5, -2, -13, -2, 1, 5, 4, -4, 6, -1, 11, 6, 3, 0, -7, 4, -5, 4, 1, 1, -1, 1, 0, -13, -10, -33, -10, 1, 0, 2, -2, 1, -6, 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candies and divide them into groups.", "whyItMatters": "The Hindu\u2013Arabic numeral system simplified calculations and sharing."}, {"id": "5b5b84af9433", "title": "The word 'salary' comes from 'salarium'", "slug": "the-word-salary-comes-from-salarium", "headline": "Ever wondered why Roman soldiers got paid in salt?", "summary": "The word 'salary' comes from 'salarium' \u2014 Roman soldiers were sometimes paid in salt", "source": "The word 'salary' comes from 'salarium' \u2014 Roman soldiers were sometimes paid in salt", "sourceUrl": "https://en.wikipedia.org/wiki/Salary", "articleUrl": "https://en.wikipedia.org/wiki/Salary", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 5, 0, 0, 7, -7, 9, 1, 0, -7, 8, -7, -5, -3, 1, -14, -5, 3, -5, -2, 10, -4, 5, -8, 11, 0, -7, 2, -3, -15, -4, 3, -1, -1, -3, 7, -4, 0, 3, 7, 2, 6, -4, 1, 0, -2, 2, -1, 6, 11, 0, 3, -1, 6, 0, 4, 4, 10, -4, 0, -6, 5, -17, 0, -2, 0, -2, -2, -9, 2, -2, -5, -3, -1, 6, 4, -5, 1, 6, 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8, 0, 4, -12, 12, -3, -11, -10, 5, 1, 0, -7, -11, -3, 5, 5, -1, 0, -3, 0, 7], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Colosseo_2020.jpg/1280px-Colosseo_2020.jpg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "FeaturedPics", "explanation": ["Imagine you're a Roman soldier, and your daily bread is scarce. You need salt to preserve your food, just as you need a salary to support yourself and your family.", "A salary is like a steady supply of salt for your daily bread, ensuring you can eat and live comfortably. It's a regular payment that helps you manage your basic needs."], "example": "If your salary is 100 denarii per month, you can afford a month's worth of salt, food, and shelter.", "whyItMatters": "A salary is a regular payment that helps you cover your essential living costs."}, {"id": "448288f85b72", "title": "The word 'quarantine' comes from 'quaranta giorni'", "slug": "the-word-quarantine-comes-from-quaranta-giorni", "headline": "Did you know a simple word helped save lives during plagues?", "summary": "The word 'quarantine' comes from 'quaranta giorni' \u2014 40 days ships waited in Venice during plague", "source": "The word 'quarantine' comes from 'quaranta giorni' \u2014 40 days ships waited in Venice during plague", "sourceUrl": "https://en.wikipedia.org/wiki/Quarantine", "articleUrl": "https://en.wikipedia.org/wiki/Quarantine", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [0, 1, -1, 4, 1, -3, 7, 2, -6, -9, -3, -3, -2, 1, -2, -2, -2, -4, -3, 0, 3, 1, -3, -2, 2, -1, 0, 2, 1, -10, -7, -7, -7, 6, -5, 11, -3, 1, 3, 1, 2, 13, 3, -1, -7, -6, -7, -1, 2, -6, -6, 8, -2, 5, 0, -2, 3, 1, 0, 2, 6, 0, -17, 4, -4, -1, -7, 6, -2, 4, -3, -2, 2, 17, 6, -4, 0, 4, 1, 0, 10, 4, 2, -1, -5, -3, -3, 3, 6, 3, 6, -7, 3, 1, -5, -10, -8, 1, -3, 44, -5, 1, -5, 2, 5, 3, 5, -10, -5, 4, 2, 2, 7, -3, 1, 0, 6, -4, -1, 10, 3, -6, 7, -2, 5, 6, 0, 11, 2, -5, 16, 6, 6, 2, 1, 0, 3, 0, 2, -12, 2, -10, 2, -9, -7, -5, 3, 1, -5, -5, 0, 4, 1, -10, -1, 2, 14, 7, 0, -1, -1, -8, -1, 5, 9, -8, -1, 2, -3, -4, 9, -2, -1, 3, -3, 0, 2, -1, 6, 3, -3, -7, -6, 8, 0, 1, -8, 3, 7, -3, 5, -5, 3, 1, -3, -1, -5, 5, -2, -2, -7, -1, -3, -1, 3, 2, 10, -5, 3, -1, 0, 6, 3, -1, -2, 10, -3, -3, -1, 3, 6, -10, -11, -35, -8, -10, -6, 3, -2, -6, -2, 1, -6, 1, -9, -1, 0, -4, 6, 6, 7, -6, -1, -3, -1, 1, -4, 1, 7, 22, 12, 4, -1, 1, 1, 2, -13, 4, 0, 1, 10, -7, 1, 2, 5, -5, 6, -2, 1, -3, 2, -4, 1, 1, 5, 3, 5, -1, -4, -5, 5, 4, 6, 3, 12, 2, 0, -6, -5, -1, -1, 5, -2, -11, 18, -12, -17, 8, -2, 1, -5, -5, -3, 6, -5, -2, 2, -2, 2, 0, 3, 7, 8, 5, 3, 4, 1, -3, 2, -34, 7, 7, 0, 1, -2, -4, -3, 2, 4, 3, -5, 5, 2, -5, 3, 5, -4, -5, -6, -1, -2, 17, 1, -1, -6, 0, 8, -3, 5, -13, -8, 5, -3, 3, 2, 0, 10, 0, -3, -16, 1, 5, 3, 4, -3, 4, -16, 1, 9, -13, 1, 1, -2, 4, -9, 1, 2, 4, 9, -6, 5, 4, -1, 2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Museum_of_the_Bible_%2853839146587%29.jpg/1280px-Museum_of_the_Bible_%2853839146587%29.jpg", "imageLicense": "CC BY 2.0", "imageArtist": "ajay_suresh", "explanation": ["Imagine you're at a beach party, and suddenly you hear about a contagious disease spreading. People are getting sick, and there's a fear of catching it too.", "Quarantine means keeping people away from each other to stop the disease from spreading. It's like putting everyone in a bubble to protect them."], "example": "At the beach party, everyone stays in their own spot, not mingling with others, for 40 days.", "whyItMatters": "Quarantine is a protective bubble that stops diseases from spreading."}, {"id": "2c16ec2cf68a", "title": "OK gesture", "slug": "ok-gesture", "headline": "Why is OK the most universally recognized gesture?", "summary": "OK is the most widely understood word in the world \u2014 origins debated since the 1830s", "source": "OK is the most widely understood word in the world \u2014 origins debated since the 1830s", "sourceUrl": "https://en.wikipedia.org/wiki/OK_gesture", "articleUrl": "https://en.wikipedia.org/wiki/OK_gesture", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -5, 2, 1, -1, 0, 15, 1, -1, 1, -2, -6, -4, -3, -3, 5, -2, -2, -10, -1, 9, 5, 5, -3, -4, 3, -10, 3, 4, -10, -8, -1, 9, 8, -4, 9, -2, -6, 2, -3, -2, 5, 4, -8, -4, 5, 2, 8, -6, 2, 5, 3, -4, 2, 2, 7, 0, 0, 0, -1, 4, -3, -17, 12, -3, -4, 5, -1, -5, 3, 4, -1, 0, 9, 0, 5, 4, -8, -6, -3, 5, 8, -2, -8, -8, -11, 2, -4, 2, 6, -5, -1, -1, -1, 4, -2, 1, 0, -4, 39, -7, 7, -7, -8, 14, -5, 0, -3, -4, 4, -4, -4, 4, 5, 1, -5, 6, -6, 7, -11, 0, -2, 1, 4, 0, -5, 3, 6, 10, -11, 11, -7, -2, -4, 6, 4, 6, 2, 2, 0, 3, -11, -3, -2, -9, 3, -5, -2, 2, -1, 4, -1, -6, 6, 0, 3, 11, 3, 2, -5, 1, -1, -5, 0, -3, -21, -6, -1, 0, 2, 13, 0, -4, 13, 6, -2, 4, 4, -5, -5, 15, -6, 0, -1, 0, -1, -2, -1, 16, 5, 12, 4, 4, 1, -2, 2, 1, -1, -3, 0, -10, -2, -4, -4, 12, 3, 9, 2, 7, 2, -5, 0, -7, 2, -6, -4, -5, 1, -2, 1, 2, -13, -6, -34, -2, 0, 6, 21, -2, 3, -8, 4, 6, -2, 2, 2, 5, 3, 3, -2, 1, 3, 9, 3, 6, -5, -3, -7, -2, 20, 3, 4, -5, 8, 2, 2, -12, 3, 4, -4, 0, 3, 0, -1, 0, 4, 4, -4, -1, 2, -9, 4, -1, 6, -3, 2, 12, -11, 4, -1, 2, 5, 1, 1, -1, -6, -3, -8, 6, -2, -2, -2, -1, -15, 13, -9, -18, 8, 1, 7, -6, -6, -4, 13, -3, 0, -5, -4, 0, 7, -4, -2, -2, 3, -4, 0, -13, 0, 1, -32, 0, 2, 5, -5, 7, -8, -3, -2, 3, 4, -3, 0, 2, -1, 2, 11, 2, -7, -6, 6, 3, 9, 3, -1, -2, -4, 7, 1, -5, 5, -1, 3, -7, 4, 2, -5, -1, 2, -2, -8, 1, -4, -7, 7, 4, 3, -8, 6, 2, -2, -8, 0, 4, 2, 4, -1, 3, -1, -8, -3, 5, -1, 9, 5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Emoji_u1f44c.svg/1280px-Emoji_u1f44c.svg.png", "explanation": ["Imagine you're traveling abroad and someone gestures with their hand. You don't speak their language, but you want to know if they're okay.", "The OK gesture is a simple hand signal that transcends language barriers, conveying a basic message of well-being or agreement."], "example": "You see the OK gesture and understand it's a friendly way to ask if someone's alright or to agree with something.", "whyItMatters": "The OK gesture is a universal symbol that can communicate basic sentiments across different languages and cultures."}, {"id": "0078e5b41103", "title": "Longest word in English", "slug": "longest-word-in-english", "headline": "Did you know there's a super long word without repeats in English?", "summary": "The longest word in English without a repeated letter is 'uncopyrightable' \u2014 15 letters", "source": "The longest word in English without a repeated letter is 'uncopyrightable' \u2014 15 letters", "sourceUrl": "https://en.wikipedia.org/wiki/Longest_word_in_English", "articleUrl": "https://en.wikipedia.org/wiki/Longest_word_in_English", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -14, -3, 6, -2, 5, 2, -2, 6, -3, 1, -5, -3, -8, -1, -1, 0, -2, -8, 1, 19, 4, 2, -4, 5, 8, 1, -5, -1, -16, -3, 3, 3, 7, 4, 9, -8, 4, -1, 4, -7, 4, 6, 0, 0, -1, -2, -1, 6, -1, -2, 4, 6, 2, 7, -1, 5, -3, 4, -10, 2, 4, -11, 2, 5, 2, -3, -3, -7, 12, 3, 7, -4, 11, 8, 4, 3, -4, -3, 5, 0, -7, -2, -4, -4, -10, -10, 1, 0, -1, 3, 5, 4, 0, -6, -9, 1, 9, -5, 40, -11, 5, -7, -2, 3, 3, 0, -1, -5, 2, -3, -1, 12, -7, -9, 4, 9, -5, -1, 9, -10, 3, 2, -5, -1, 5, 2, 6, 5, 5, 0, -1, 5, 4, -4, 0, -1, -1, 9, -4, 0, -16, 4, 6, -2, 4, -13, 5, -9, 9, -7, 2, 1, -11, 6, 1, 12, -3, 0, -7, 4, -3, -3, 2, -4, -14, 2, -1, -9, -1, 8, -8, -4, 7, -2, 0, -4, -1, 1, 7, -6, -2, -1, 4, -1, 0, 4, 1, 11, 4, -2, 1, -2, -8, -6, -4, 1, 2, 3, -4, -5, 0, 6, -3, 12, 1, 14, 5, 8, 4, -11, -6, 2, 2, -7, -2, -2, 3, 3, -3, 2, -13, -8, -36, -1, 4, 1, 9, -7, 2, 2, 5, 4, -7, -4, -9, -1, -7, 11, 0, -1, 1, 3, 6, 4, -8, -2, 1, 5, 21, -5, 0, -3, 2, 2, -3, -6, -3, 3, -8, -2, -2, 1, -3, 4, -3, 7, 1, 0, -5, -8, -3, 5, 1, 3, 1, 4, -4, 6, -11, -10, 4, 2, 0, -4, 1, -5, -1, -1, 2, 2, -1, 0, -10, 13, 2, -9, 5, 0, 0, -2, 1, -7, 7, -5, 12, 5, 4, 0, 1, 3, -1, 10, 11, 4, 3, 0, -2, -6, -26, 3, 3, 8, 3, 11, -6, -4, -7, 4, -3, 11, 0, -8, -7, -2, 15, -4, 0, -2, 7, 4, 13, 0, -4, -6, -1, 11, -9, -5, -6, 2, 2, -1, -1, 3, -2, 7, 7, -1, -4, 2, -3, -1, 10, 1, 1, -11, 0, -4, -11, -5, -1, 13, 1, 3, -4, -3, -2, -4, -10, 0, 8, 5, 2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/9/94/OptischerTelegraf.jpg", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Lokilech at German Wikipedia", "explanation": ["Imagine you're playing Scrabble with friends and you're stuck because you can't find a long word that fits your tiles.", "The longest word without repeating letters in English is 'uncopyrightable', a 15-letter marvel. Imagine fitting this word into your Scrabble rack."], "example": "You have tiles for 'un', 'c', 'o', 'p', 'e', 'r', 'i', 't', 'a', 'b', 'l', 'e', and you can spell 'uncopyrightable'.", "whyItMatters": "The longest word without repeating letters in English is 'uncopyrightable'."}, {"id": "1daa3b455dbf", "title": "Mandarin Chinese", "slug": "mandarin-chinese", "headline": "Mandarin's the most spoken language worldwide \u2014 why?", "summary": "Mandarin Chinese is the most spoken first language \u2014 about 920 million native speakers", "source": "Mandarin Chinese is the most spoken first language \u2014 about 920 million native speakers", "sourceUrl": "https://en.wikipedia.org/wiki/Mandarin_Chinese", "articleUrl": "https://en.wikipedia.org/wiki/Mandarin_Chinese", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [0, -5, -2, -5, -1, 0, 9, 2, 8, -1, 0, -7, 0, 9, -1, 2, -3, -15, -2, -5, 11, -10, 4, -6, 0, 5, -8, -7, 8, -18, -7, 6, 11, -2, -1, 0, 2, -9, 3, 5, -6, 11, 6, -2, 4, -2, -6, 1, -5, 2, 3, -1, -1, 5, 2, 4, 10, 2, -2, -2, -4, -7, -9, 12, -4, 3, 8, 2, 1, 3, -6, 3, -3, 3, 0, -9, 13, -4, -1, -3, 8, -3, -11, -12, 3, -3, -4, 5, -3, -2, -4, -1, 4, 3, -1, -5, 6, -2, 3, 40, -2, -2, -2, -12, 7, -1, 6, -2, 0, 6, -9, -6, 9, 1, 7, -3, 9, -4, 0, 6, 0, 4, 5, -10, -1, -6, -3, 7, 2, 2, 10, -5, -1, -4, -1, 2, 2, 2, 0, 1, -2, 0, -4, -6, -9, 6, -11, -7, -1, 4, 5, 1, -2, -5, 3, -1, 10, 3, 0, -7, 1, -4, 0, 5, 1, -14, -8, 4, -4, -7, 3, -2, -5, 6, -1, -3, -7, -3, 0, 9, 6, 6, 4, -2, -4, -5, 3, 5, 0, -2, 2, 10, 0, -4, -7, 3, 6, 1, 1, -6, -2, 3, -2, 5, 4, -2, 5, 6, 1, 1, -4, -1, 4, 2, -2, -7, 0, 3, 5, 1, 5, -13, -13, -32, -4, 6, -6, 11, -7, 4, 2, 10, 10, -8, 12, 5, 9, 1, -1, 7, 9, 5, 0, 10, -2, -7, -9, -6, -2, 16, -5, 0, 1, 4, -3, -1, -7, 7, -3, 0, -7, -1, 9, 9, -11, 1, 3, -7, 3, -10, 1, -4, -6, 1, 6, 4, 3, -10, -1, -7, 0, -2, 3, -5, -2, 6, 2, -10, 3, 2, 1, 5, 2, -10, 13, -1, -9, 3, 2, 2, -9, 5, -8, 14, -4, 7, -2, 1, 1, 12, 3, -8, 3, 4, 0, -2, -18, -7, 1, -29, 0, 3, 9, -3, 2, -5, -1, -5, 7, 7, 1, 0, -2, 3, -4, 11, 1, 10, 6, -2, 2, 13, 4, 5, -6, -5, 2, -5, -6, -4, -2, 17, -6, -9, 2, -2, 0, 4, -4, -5, 0, -4, -8, 8, 2, 2, -9, 0, 1, -3, -8, 0, 5, -2, 4, 5, -2, 3, -2, 10, 1, 2, 3, 6], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Guanhua_swapped.svg/1280px-Guanhua_swapped.svg.png", "explanation": ["Imagine you're planning a global video conference with friends from different countries. You want everyone to understand each other without language barriers.", "Mandarin is the language that bridges these friends, as it's the most spoken first language globally. The technical term is Mandarin Chinese."], "example": "With 920 million native speakers, Mandarin ensures your friends from China can easily communicate.", "whyItMatters": "Mandarin Chinese is the key to connecting with the largest number of people worldwide."}, {"id": "81b99f6954a1", "title": "Sorbian languages", "slug": "sorbian-languages", "headline": "How many languages disappear every two weeks?", "summary": "There are about 7,000 languages in the world \u2014 one goes extinct roughly every two weeks", "source": "There are about 7,000 languages in the world \u2014 one goes extinct roughly every two weeks", "sourceUrl": "https://en.wikipedia.org/wiki/Sorbian_languages", "articleUrl": "https://en.wikipedia.org/wiki/Sorbian_languages", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-8, -3, -1, 2, -4, 6, 2, -2, 2, -3, -2, -6, 5, 5, 6, -7, -4, -9, -7, -6, 11, -3, 3, -3, -12, 12, -8, 0, 4, -16, -7, -2, 4, -2, -7, 4, -5, -1, 0, 12, 1, 7, 5, -7, 0, -5, -7, 0, -1, -4, -1, -6, 4, 9, -1, 0, 0, 8, -3, -2, 5, -9, -18, 11, -6, 3, 3, -5, -4, 0, -2, 4, 4, 12, 6, -8, 2, 0, -2, -1, 8, -9, 2, -5, -3, -4, -5, 7, -10, -2, 3, 11, 16, 3, -4, -6, -2, 6, 0, 38, 1, -8, 4, 2, 2, 3, -7, -6, 3, -1, -1, -1, 6, -11, 8, 4, 9, 3, 0, 6, -10, -3, 9, -4, 12, 8, 5, 8, 8, 1, 3, 5, 0, 2, 1, -2, 1, -1, -1, -8, 4, -9, 4, 0, 6, 8, -1, -2, 0, 6, 0, 4, -1, -9, 6, 3, 14, -3, 0, -9, -6, 0, -8, 10, 5, -8, -4, 3, 1, -3, 5, 5, 0, 2, 10, -7, -12, -2, 5, 4, -7, 6, 0, 5, -2, -11, -1, 2, 4, 5, -3, -5, 5, -10, 2, -3, 2, -6, 6, 0, 8, -6, 0, -1, 4, 2, 4, 1, 4, 6, -2, -2, 6, 0, 8, -6, -6, 0, 6, 2, 2, -18, -8, -33, -6, 3, -6, 4, -4, -1, -4, 13, 14, -5, 0, -3, 7, -8, -4, -2, 2, -7, 1, 10, -3, -2, -10, -5, -1, 15, -2, 3, -8, 1, 6, -1, -1, 4, 8, -1, -5, 0, 0, 5, 0, 2, 2, -4, 4, -5, -9, -2, 6, -3, 6, 6, 7, -13, 0, -7, -7, -5, 1, -1, 1, 1, 3, 4, 0, -2, -2, -3, -3, -3, 16, -6, -14, -5, 3, -2, -4, -1, -4, 11, -9, 1, 4, 7, 7, 8, 1, 0, 5, 8, 3, 4, -1, -6, 3, -26, 3, 1, 5, 7, 5, -6, -2, 5, -6, 7, 7, 3, -5, 5, -1, 8, 0, 7, 3, -1, -4, 10, 6, -1, -6, -5, 8, 3, -2, -14, -2, 7, -8, -8, 0, -3, 2, 2, -5, -5, 6, 2, -9, 13, -2, 5, -9, 1, 4, -7, 1, 1, -2, -8, 5, 0, 0, 1, -7, 3, -3, -4, 3, -2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/04/%D0%9B%D1%83%D0%B6%D0%B8%D1%86%D0%BA%D0%B8%D0%B5_%D1%81%D0%B5%D1%80%D0%B1%D1%8B_%D0%BD%D0%B0_%D0%BA%D0%B0%D1%80%D1%82%D0%B5_%D0%93%D0%B5%D1%80%D0%BC%D0%B0%D0%BD%D0%B8%D0%B8.svg/1280px-%D0%9B%D1%83%D0%B6%D0%B8%D1%86%D0%BA%D0%B8%D0%B5_%D1%81%D0%B5%D1%80%D0%B1%D1%8B_%D0%BD%D0%B0_%D0%BA%D0%B0%D1%80%D1%82%D0%B5_%D0%93%D0%B5%D1%80%D0%BC%D0%B0%D0%BD%D0%B8%D0%B8.svg.png", "explanation": ["Imagine walking into a library filled with books. Each book represents a unique language. Now, think about how many books could disappear every two weeks if a new language is lost.", "If there are about 7,000 languages worldwide and one goes extinct roughly every two weeks, it's like losing a unique book from our global library every two weeks."], "example": "If the library has 7,000 books (languages), and we lose one every two weeks, that's 3,500 books gone in a year.", "whyItMatters": "There are about 7,000 languages in the world, and one goes extinct roughly every two weeks."}, {"id": "451412cd6079", "title": "English alphabet", "slug": "english-alphabet", "headline": "Did you know the Hawaiian alphabet is super simple?", "summary": "The Hawaiian alphabet has only 13 letters \u2014 5 vowels and 8 consonants", "source": "The Hawaiian alphabet has only 13 letters \u2014 5 vowels and 8 consonants", "sourceUrl": "https://en.wikipedia.org/wiki/English_alphabet", "articleUrl": "https://en.wikipedia.org/wiki/English_alphabet", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-8, -2, 2, -7, -12, 9, -2, 5, 0, 9, -3, -7, 6, -2, 3, -6, -1, -8, -8, 1, 14, 5, -7, 3, 0, 9, 1, -1, 2, -19, -10, 4, 11, 0, -4, 3, -5, 7, 6, -3, -2, 2, 8, -1, -1, -6, -9, 2, 4, -2, -1, 0, 0, 5, -4, -10, 6, 4, -3, -3, 3, 5, -13, 11, -6, 0, 6, -8, -1, 1, 2, 2, 3, 4, -1, -1, -4, -2, -5, -7, -4, -11, 0, 2, 0, -7, -5, -1, -6, -1, -2, 5, 4, -1, -6, -4, -6, -6, -4, 38, -9, -1, 7, -9, 1, -3, 2, -9, -5, 3, -1, 1, 7, -6, -6, 4, 10, 2, 7, 7, -6, -1, -2, -1, 0, -6, 1, 6, 14, 9, 0, 1, 9, -4, 5, 1, 7, -3, 3, -3, 2, -4, 2, 3, -6, 4, -7, 0, -2, 2, -3, 6, -4, -8, -3, -6, 2, 5, -1, -2, 1, -9, -2, -2, -3, -9, -4, 4, 1, -8, 7, 9, -5, 10, 12, -3, 6, 3, -5, 7, -5, -3, -1, 2, 0, 1, -4, 0, 2, 3, 7, 2, -2, 3, -4, -3, 11, 4, 2, -3, 1, 0, -6, -5, 8, 4, 6, 3, 5, -4, 1, -1, -4, 1, 1, -4, 1, -1, 11, -11, 5, -14, -2, -34, 2, 4, -4, 7, -11, -2, 5, 14, 0, -1, 2, 3, 2, -1, 9, 3, 2, 3, 6, 2, 7, -3, -8, 4, 3, 15, -1, 8, -4, 6, -2, -3, -3, 10, -1, -6, 2, 1, 0, -12, 1, -7, -2, 0, 5, -10, -6, 1, -3, 7, 7, 4, 1, -6, 4, -11, -10, 0, 4, 2, -6, 3, 0, -4, 4, -2, -1, 4, 1, -9, 3, -3, 2, 2, -1, 6, -14, 2, -1, 3, -1, 0, 4, -3, 12, 15, 5, -2, 4, 14, 7, 14, 3, -2, -4, -31, 9, -1, 15, 5, 6, -6, -15, 2, 4, 3, 2, 5, -13, 8, -1, 5, -7, 9, -3, 0, 3, 14, -3, -12, -10, -2, 3, -1, -8, 0, 1, 14, 0, -1, -3, -5, -2, -6, -4, -7, -3, -3, -2, 12, 1, -5, -1, -3, -2, -4, -4, 6, 10, 3, 3, -3, -6, 0, -6, 5, 1, 5, 3, 4], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/a/a3/File-Dax_sample.png", "explanation": ["Imagine trying to learn a new language with hundreds of letters; it would be overwhelming!", "The Hawaiian alphabet uses only 13 letters, making it easier to learn and remember compared to languages with thousands of letters."], "example": "Instead of memorizing 26 letters like in English, you just need to remember 13 in Hawaiian.", "whyItMatters": "The Hawaiian alphabet's simplicity makes language learning quicker and less daunting."}, {"id": "46c23a93452e", "title": "Basque language", "slug": "basque-language", "headline": "Basque is a language isolate \u2014 unrelated to any other known language on Earth", "summary": "Basque is a language isolate \u2014 unrelated to any other known language on Earth", "source": "Basque is a language isolate \u2014 unrelated to any other known language on Earth", "sourceUrl": "https://en.wikipedia.org/wiki/Basque_language", "articleUrl": "https://en.wikipedia.org/wiki/Basque_language", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-3, 4, -6, 1, 0, -9, 4, -1, 6, 0, 6, -4, -8, 1, 7, -5, -1, -6, -5, -2, 15, -1, 2, 2, 4, 11, -2, -3, 0, -18, -7, -4, 0, -5, -6, 0, 2, -1, -7, 14, -4, 2, -2, -2, -1, 0, -10, 0, -6, -3, 6, 0, -5, -3, -3, 6, 8, 2, 0, 4, 1, 4, -10, 3, 4, 10, -2, 3, 2, -4, 0, 6, -4, 6, 7, -2, 2, 6, -6, 3, 0, 1, -4, -10, 5, -5, -1, -1, -5, 6, -9, -2, 8, 4, 2, -2, 2, -1, 8, 50, -4, -1, 6, 5, 5, 2, -1, 2, 2, 0, -8, -4, 0, -1, -3, 1, 5, -7, 4, 3, -5, 0, 5, 1, 6, 4, 3, 0, 14, 4, 13, -4, 4, -5, -5, 3, -3, 4, 9, -4, 2, -8, 2, 3, -2, 5, -7, 3, -7, 5, -4, 6, 0, -4, -5, 1, 4, 0, 1, 4, 0, 0, -3, 9, -3, -6, -13, 8, -1, -2, 0, 1, -1, 1, -2, -1, -4, -3, -3, 4, 3, -3, -2, 8, -5, -1, -10, -2, 2, 8, -1, 0, -3, 1, 1, 10, 7, -4, 0, -9, 8, 11, 6, 3, -8, 1, 5, 1, 0, -1, 0, 1, 1, -2, 2, 3, 0, 4, 5, 4, -4, -15, -5, -33, -9, 0, -2, 6, -4, 5, -1, 0, 1, -4, 0, -6, 4, -5, 12, 10, -9, -1, -2, 3, -1, 1, -1, -1, 0, 13, 2, 10, -11, -3, 3, -2, -11, -1, -5, 6, -6, 0, -4, 4, -9, 1, 5, -1, 2, -4, -2, 4, 3, 4, 7, 4, 12, -3, 5, -11, 0, 0, -3, 1, 6, 6, -1, 0, 9, 0, -2, 4, 6, -4, 18, -5, -13, -5, 7, -4, -1, 2, -2, 11, -9, 9, -2, -5, -1, 3, -8, -3, 0, 2, 3, -2, -7, 4, 1, -29, 1, 14, -5, 10, 1, -5, -11, -5, 1, 7, -4, 2, -5, -4, 9, 17, -1, 11, 3, -4, 3, 15, 6, -3, 0, -6, -6, 3, 3, -4, -3, 8, -7, -5, -8, 2, 3, 5, -12, -4, -2, -9, -14, 0, -4, -2, -10, -5, -3, -1, -2, -2, 2, -1, 1, -2, 2, -10, -8, 2, 0, -6, 14, 1], "explanation": ["Basque has 806,000 speakers, with a significant majority in Spain and a smaller percentage in France. The language's widespread use in the Basque Country reinforces its importance as a marker of Basque identity and culture."], "whyItMatters": "Understanding Basque's status as a language isolate helps appreciate its unique cultural and linguistic heritage.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Euskalkiak.svg/1280px-Euskalkiak.svg.png"}, {"id": "2e85ba70a7ed", "title": "Rosetta Stone", "slug": "rosetta-stone", "headline": "The Rosetta Stone features three scripts: hieroglyphic, demotic, and Greek", "summary": "The Rosetta Stone was written in three scripts \u2014 hieroglyphic, demotic, and Greek", "source": "The Rosetta Stone was written in three scripts \u2014 hieroglyphic, demotic, and Greek", "sourceUrl": "https://en.wikipedia.org/wiki/Rosetta_Stone", "articleUrl": "https://en.wikipedia.org/wiki/Rosetta_Stone", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-8, 3, 3, 5, -13, -1, -3, 2, -4, -4, -11, -2, -2, -3, 3, -7, -5, 4, -5, -7, 19, -3, -7, -3, -3, 10, 2, -1, -2, -16, -5, 7, 4, -13, 0, 2, -11, 3, -4, 1, -1, 3, 2, 2, -3, -9, -7, -6, -1, -5, -9, -4, 0, 4, -4, -7, 5, 10, -4, 5, 4, 10, -17, 8, 4, 9, -4, -7, 2, 3, -8, -6, 1, 1, 3, -7, 7, -7, -4, -5, 7, -5, 1, 5, -1, -6, 5, 3, -5, -5, 2, -9, -4, 2, -2, -2, -4, 4, 4, 41, -2, 0, 13, 2, -3, -6, 7, -9, -1, 5, -4, -6, 5, 2, 2, -6, 1, -6, -1, -3, 5, 1, 0, -5, -1, -7, 3, 6, 4, 1, 2, -3, 0, 1, -2, 3, 3, -4, 2, -7, -3, -7, 1, 3, 3, 13, -1, 5, 5, 12, -6, 10, 2, -2, 0, 4, 0, 7, 4, 0, -4, -1, -6, 10, -2, -4, 2, 7, -6, -2, 7, 1, -9, 0, -1, 0, 0, 2, 5, 3, 5, -5, -9, -2, 0, -9, -3, 4, 3, 8, 8, 9, 2, -1, -2, 2, 3, 6, -1, 6, -4, 8, -1, 2, 4, -2, 7, 2, 8, -7, -6, 5, 6, 5, 0, 0, -4, -4, -6, -5, -1, -12, -11, -33, -3, 13, -5, 11, -4, 2, 9, 5, 6, 4, -4, -6, -5, -1, 6, -3, -5, 1, 2, 3, -3, -3, -16, 1, 3, 14, 6, -3, -5, 4, 0, 2, -5, 12, 3, 5, 7, -3, 1, 2, -1, -5, 0, 5, -2, -9, -2, 12, 0, 5, 5, -8, 1, -11, 9, -16, -2, -6, 2, 8, 0, -2, 0, 2, 0, 0, 4, 3, 5, -9, 6, -1, -8, 2, 5, 7, 0, 3, 4, -3, 2, -3, 7, 3, 5, 2, -1, -1, -3, -1, 6, 3, 8, -2, -1, -35, 6, 2, 1, 10, -3, 0, -4, 3, -7, 8, -1, 3, -6, 0, 4, 12, -7, -2, 0, -2, 7, 19, -2, -10, -4, 3, 6, -6, 1, -4, -1, 4, 5, 3, 4, -8, -1, 0, 11, -10, 5, -8, -8, 7, 6, -5, -4, -3, -3, -3, 5, -1, 3, -3, 1, 6, 4, -3, 9, 2, -9, 6, 6, 3], "explanation": ["The Rosetta Stone was discovered in 1799 by Pierre-Fran\u00e7ois Bouchard during France's invasion of Egypt. Its discovery sparked widespread interest and led to significant advancements in the field of Egyptology."], "whyItMatters": "The Rosetta Stone's unique feature of containing three scripts was instrumental in deciphering ancient Egyptian hieroglyphs, marking a turning point in understanding ancient Egyptian civilization.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Rosetta_Stone.JPG/1280px-Rosetta_Stone.JPG"}, {"id": "eabf0642430c", "title": "Ray Tomlinson", "slug": "ray-tomlinson", "headline": "Ray Tomlinson invented the first email program in 1971", "summary": "The first email was sent in 1971 by Ray Tomlinson \u2014 he chose the @ symbol", "source": "The first email was sent in 1971 by Ray Tomlinson \u2014 he chose the @ symbol", "sourceUrl": "https://en.wikipedia.org/wiki/Ray_Tomlinson", "articleUrl": "https://en.wikipedia.org/wiki/Ray_Tomlinson", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-8, 5, -1, -7, -6, -1, 4, 5, 1, -4, -3, 5, -4, -2, -3, 7, -2, -9, -3, 0, 8, -6, -6, -5, 9, 13, -5, 0, -2, -14, 2, -2, 2, 9, -2, 5, 3, -4, -8, -4, 2, -6, -1, -1, -4, -9, 2, 1, -2, -1, 5, 8, 9, 1, 1, 4, 1, 9, -8, -2, -3, 6, -22, 7, 0, -1, -3, 3, -4, 10, -7, 3, -8, -1, 5, 4, 1, 2, -1, -3, 4, -1, -4, 5, -5, 1, -5, -4, 1, -2, -5, -1, 3, 3, -3, -2, -2, -3, -7, 46, -3, 5, -1, -8, 2, -2, 3, -13, -5, 2, -8, -1, 3, -4, 2, 2, -10, 4, 6, 3, 4, 6, 12, -3, -8, 1, 3, 17, -1, 2, 4, -2, -6, -2, 5, 6, -2, 0, -1, 4, 5, -3, -2, 2, -5, 3, -6, -3, -5, 2, 2, -2, -3, -9, 3, -5, 3, 9, 1, -2, -7, -3, 7, 3, 1, -21, 6, -1, 6, -1, 1, 3, 5, 5, 1, -3, 6, -2, 4, 3, 7, -5, 8, 5, 2, 2, 6, 3, 6, 2, 5, 8, 2, -3, -11, -6, -5, 2, 4, 0, -7, -7, -2, 9, -2, 2, 2, -3, 4, -1, 1, 2, 2, -1, -8, 5, -4, 3, 7, 0, -2, -1, -8, -37, -9, 8, -4, -2, -6, 5, -7, 1, 0, 9, 3, -2, -10, -4, 5, 5, -2, 6, -5, -10, 0, -2, -2, 8, 0, 11, 9, -8, -1, -4, 2, 8, -5, -3, 5, -2, 2, 6, -2, -4, -5, -4, -6, -1, -6, 1, -16, 4, 5, 3, -6, 3, 10, 0, -9, -10, 8, 1, 5, 0, -12, -3, 1, 0, -5, -2, -1, -3, -1, -4, 10, -4, -7, 9, -3, 3, -3, 3, -1, -1, -3, 9, 1, -4, 4, 2, 1, -4, 8, 3, -5, 0, 3, 5, -4, -27, 3, 6, 3, 3, 12, 8, 2, -5, -2, 3, -5, 12, 2, -3, 0, -2, 0, -13, 0, 0, 7, 17, 0, -7, 5, 9, 4, 9, 3, 5, 7, 0, -2, 3, 1, 7, -3, -6, 4, -7, 8, -4, -2, 3, 12, -7, -5, -3, -1, -3, -2, -4, 6, -3, 10, -9, -4, -6, 0, -3, -1, 19, 6, 12], "explanation": ["Ray Tomlinson created the first email program on the ARPANET system in 1971, revolutionizing communication by enabling mail between users on different hosts. Prior to this, email was limited to users on the same computer. Tomlinson's innovation introduced the use of the @ symbol to separate the username from the machine name, a convention still used in email addresses today."], "example": "Before Tomlinson's invention, sending an email required both sender and receiver to use the same computer. After Tomlinson's invention, an email could be sent from user@example.com to user@differenthost.com, allowing for communication across different hosts connected to ARPANET.", "whyItMatters": "Tomlinson's invention laid the foundation for modern email communication, enabling users to connect and share information across diverse computer networks.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/d/dd/Ray_Tomlinson.jpg"}, {"id": "05788ecf2aea", "title": "Photograph", "slug": "photograph", "headline": "First photograph took 8 hours of exposure \u2014 taken by Ni\u00e9pce in 1826", "summary": "The first photograph took 8 hours of exposure \u2014 taken by Ni\u00e9pce in 1826", "source": "The first photograph took 8 hours of exposure \u2014 taken by Ni\u00e9pce in 1826", "sourceUrl": "https://en.wikipedia.org/wiki/Photograph", "articleUrl": "https://en.wikipedia.org/wiki/Photograph", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [1, 6, 2, 1, 5, -3, 5, -6, -2, 5, -2, -6, -1, 5, -11, 3, 1, -8, -9, 4, 6, -10, 1, -4, -4, 3, 5, -2, -4, -17, 6, 1, 7, -4, 0, 1, -3, 1, 1, -1, 6, 3, -7, 1, 3, -3, -2, 0, 8, -7, -3, -2, 7, 0, 5, -4, 8, 0, 3, 2, -1, 7, -24, 11, 1, 2, -1, -5, 6, 4, -1, 9, -4, -3, 3, -1, 3, 0, -2, -7, 6, 4, 4, -2, 2, 0, -3, -8, 3, 1, 2, -9, -11, -2, 0, -5, -2, 8, 9, 44, -3, 5, 6, 0, -5, -4, 0, -4, -7, 2, 5, -11, 3, -3, 10, 1, 6, -5, 2, 6, 8, -1, 3, 0, -12, 0, 12, 6, 9, -2, 2, -4, 7, -1, 1, 8, 5, -6, 1, -8, -2, -11, -4, 2, -1, 5, 4, 4, -3, -8, -3, 3, -3, -3, -2, -10, 4, 6, -3, -2, 2, -5, 1, 7, 4, -4, 6, 0, -4, -6, 2, 1, -1, 3, -2, 3, 1, 4, 3, -4, 3, -7, -2, 1, 0, 0, 3, 9, 1, 18, 0, 2, -4, 3, -7, -7, -6, 0, -9, -11, -2, -7, 1, 9, 3, 0, -3, 4, 6, 3, -1, -1, 2, 0, 0, 6, -1, 4, 5, 4, 1, -10, 1, -36, -2, 2, -6, 4, -16, 4, -6, 5, -6, -1, -2, 0, 6, -5, 4, 5, 2, 10, -5, 0, 8, -7, -3, 2, -1, 16, 0, -14, -3, 2, -2, -4, -11, -1, -3, 4, 6, 6, 0, 4, 3, 5, 1, -3, 1, -5, 0, -2, -4, -5, -6, -6, 1, 3, -10, -12, 9, -1, 12, 1, -4, 2, -7, 3, -2, -3, -11, 4, -10, 3, 11, -9, -12, 4, 1, 3, 2, 3, -1, 6, -5, -3, 11, 0, 0, 11, -5, -4, -3, 2, 0, -9, 4, 8, 0, -35, 2, 10, 5, 6, 4, 3, 10, 5, -4, 1, -10, 1, 6, 7, 5, -10, -1, -6, -6, 3, 4, 8, -11, -9, 0, -4, 8, 0, 2, 2, -2, -1, -5, -2, 7, -3, -3, -13, -4, 4, 2, 10, 1, 6, -2, 4, -5, -4, -4, 2, -6, 10, 8, 5, 5, -6, 7, 3, 5, 0, 0, -1, 2, 10], "explanation": ["The first photograph was created by Nic\u00e9phore Ni\u00e9pce in 1826, marking the birth of photography. This significant achievement took an astonishing 8 hours to produce, showcasing the early challenges of capturing images. Ni\u00e9pce's pioneering work laid the foundation for the development of modern photography techniques."], "example": "Ni\u00e9pce's first photograph, known as \"View from the Window at Le Gras,\" required 8 hours of exposure time and was created using a process called heliography.", "whyItMatters": "Understanding the origins of photography helps appreciate the technological advancements and innovations that have shaped the medium.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Picture_of_Polaroid_image.jpg/1280px-Picture_of_Polaroid_image.jpg"}, {"id": "cfab1b317007", "title": "Text messaging", "slug": "text-messaging", "headline": "Did you know the first text message was sent in 1992?", "summary": "The first text message said 'Merry Christmas' \u2014 sent December 3, 1992", "source": "The first text message said 'Merry Christmas' \u2014 sent December 3, 1992", "sourceUrl": "https://en.wikipedia.org/wiki/Text_messaging", "articleUrl": "https://en.wikipedia.org/wiki/Text_messaging", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-3, 6, 3, -1, -6, -9, -2, 7, 1, 2, -4, -3, -1, -3, -1, 5, -2, -13, -10, -3, 12, -1, 0, -2, 10, 3, -5, 0, -6, -5, 4, -3, 10, 4, -5, 2, 3, -2, -5, 6, 0, 1, -1, -2, -1, -11, 0, 1, -4, -7, 3, 9, 12, 10, 5, 7, 1, 3, -4, -1, -7, 5, -23, 12, -1, 2, -6, 4, -1, 6, -2, -3, -5, -1, 0, -1, 4, 2, 1, 3, 0, 0, -2, -2, -7, -17, 1, -3, -2, -3, -3, 1, -2, 1, -17, -2, 4, 3, -1, 38, -2, 4, 1, -1, -5, 5, -2, -7, -3, -5, -3, -8, 10, 3, 5, 0, 1, -1, 12, -3, 8, -2, 4, -4, -1, -3, 13, 12, 2, 1, -1, 8, -6, 1, 1, 4, -8, 0, 8, -6, 2, -17, -2, 4, -12, -7, -1, 5, 1, 9, 4, 0, 2, 1, 8, -6, 15, 0, -3, 0, 4, -3, 0, 2, 2, -14, 1, 1, 9, -4, 6, 8, 0, -2, -3, -1, 7, -3, -3, -2, 0, -4, 8, 5, -2, -4, 1, 3, 3, -2, 5, 0, -1, 4, -2, 13, -3, -2, 4, -7, -1, -7, 4, 1, -5, -8, 13, -6, 12, -2, -4, -1, 3, -4, 1, 4, 1, 9, -1, 3, -7, -10, -10, -31, -5, 0, -6, 1, 5, 5, -11, 7, 3, 5, 7, -5, -7, 1, 0, 2, -2, 5, 0, -5, 6, -3, -6, -1, -10, 14, 7, -3, -5, 0, -2, 2, -7, 0, 1, 3, -1, 4, 9, -9, -3, -1, -2, -3, -10, -1, -7, 5, 4, 11, -7, 3, 12, 3, -4, -7, 3, 3, -3, 3, 3, -7, -1, -7, 7, -3, 3, 6, 4, -2, 10, -4, -5, 12, 1, -1, -5, 0, -5, 4, -4, 6, 0, 2, 3, 6, 5, -1, -11, 0, -2, 3, -5, 8, -8, -30, 5, 7, 3, 2, 9, 4, 11, -2, -4, -1, -1, 5, 1, 0, 1, 0, -2, -15, -2, 7, -2, 16, 6, -10, -3, 2, 7, 7, 3, 4, 4, 0, -2, 2, -5, 8, 7, -6, 1, -14, 7, 0, -6, 8, 7, -6, -7, 2, -4, -8, -1, -2, 0, 2, 0, -9, -10, -10, -11, 0, 2, 16, 3, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/4/4b/SMS_composition_on_feature_phone.png", "explanation": ["Imagine you're trying to send a Christmas greeting to your friend, but you can't call them or send a letter. What would you do?", "Text messaging allows you to quickly send a message like \"Merry Christmas\" to your friend without needing to call or write a letter."], "example": "You type \"Merry Christmas\" and hit send to your friend's phone.", "whyItMatters": "Text messaging revolutionized instant communication, making it easy to send quick messages like holiday greetings."}, {"id": "ddeaad3d83a9", "title": "1991 Soviet coup attempt", "slug": "1991-soviet-coup-attempt", "headline": "Did you know the first website was born amidst a failed coup?", "summary": "The first website went live on August 6, 1991 \u2014 created by Tim Berners-Lee at CERN", "source": "The first website went live on August 6, 1991 \u2014 created by Tim Berners-Lee at CERN", "sourceUrl": "https://en.wikipedia.org/wiki/1991_Soviet_coup_attempt", "articleUrl": "https://en.wikipedia.org/wiki/1991_Soviet_coup_attempt", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-9, 5, -2, 2, 4, 1, -4, 3, -4, -2, 1, 3, 2, 3, 4, 9, -10, -12, 8, 1, 0, -1, 6, -13, -1, 3, 6, -4, 1, -15, 6, -14, 11, -1, 4, 7, 9, -2, 2, 4, 5, -5, 4, 4, -1, -1, 14, 3, -1, 2, 2, 1, 8, -3, 3, 1, 7, 11, -5, -3, -5, -1, -21, 9, -4, 3, -9, -8, 0, -2, 5, 6, -5, 1, 5, 2, 8, -2, 2, -6, 8, 1, -4, -4, -6, -4, 4, 4, -1, -2, -6, -5, 10, -3, -6, -7, 3, 12, -1, 37, -1, 8, 4, 1, 4, -6, 5, -1, 0, -5, -1, 2, 9, -5, 13, -2, -11, -5, 0, 2, 5, 2, 7, -5, -3, 2, 8, 12, -7, 0, 3, 4, -4, -1, 0, 0, -4, 3, 2, -1, -8, 4, -10, -1, -4, -9, 2, 10, -3, -1, -2, -10, -7, -3, -3, -2, 5, 8, -7, -1, -3, 1, -2, 14, 2, -25, 1, 8, 6, -1, 0, 1, -1, -7, 9, -3, 3, 0, 4, 4, 1, -8, -3, 4, -13, -4, 5, -1, -1, 9, 4, 2, -5, -3, 3, -2, 0, -4, 5, -5, -1, -4, -6, 6, 0, 1, 2, 7, 7, 3, 6, 2, 1, -13, -1, -7, 3, -1, -1, 6, 0, -2, -4, -35, -7, -11, 5, 8, -3, 4, -7, -1, 4, 5, 5, 2, -8, -11, 0, 8, 1, 1, 0, -3, -1, 0, -7, -3, 1, 12, 9, 7, -8, 6, 2, 1, -10, 6, 7, 6, 2, -3, 1, -2, -6, 4, -9, 0, 0, -7, 8, -4, -4, -3, -10, 2, 1, -3, -1, -5, 8, 0, 7, 0, -2, -3, -4, -5, 9, 0, 0, 7, -8, -6, 11, -4, -4, 5, -7, 1, -8, 4, 6, -1, 1, 0, 0, 0, 7, 2, -6, -3, -2, -5, -2, -10, 6, 3, 5, -31, 11, -2, 4, 6, 1, 4, 4, 1, -3, 10, -6, 0, -3, 0, 0, -4, -6, -11, 4, 8, 5, 15, 4, -8, 3, 6, 7, 10, 1, -1, -3, -1, 3, -5, 5, -3, -5, -4, 3, -12, 3, 7, 1, 11, 4, 1, -9, -1, -7, -5, -4, 5, 0, -4, 5, 4, 2, -3, -3, -4, -6, 7, -1, 2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Boris_Yeltsin_22_August_1991-1.jpg/1280px-Boris_Yeltsin_22_August_1991-1.jpg", "explanation": ["Imagine you're trying to access a website, but suddenly it disappears. You're left wondering why it vanished when it was working just fine moments before.", "The first website's disappearance was like a sudden blackout during a power outage. It was created by Tim Berners-Lee at CERN, and its launch coincided with a failed coup attempt in the Soviet Union, causing a brief interruption in the internet's early days."], "example": "The website went down for a few hours on August 19-21, 1991, as the coup unfolded.", "whyItMatters": "The first website's brief disappearance reminds us that even the internet's beginnings were not immune to real-world events."}, {"id": "7ede79aa9d36", "title": "1910s in air cargo", "slug": "1910s-in-air-cargo", "headline": "Ever wondered how air travel began?", "summary": "The first commercial flight was in 1914 \u2014 Tampa to St. Petersburg, Florida, 23 minutes", "source": "The first commercial flight was in 1914 \u2014 Tampa to St. Petersburg, Florida, 23 minutes", "sourceUrl": "https://en.wikipedia.org/wiki/1910s_in_air_cargo", "articleUrl": "https://en.wikipedia.org/wiki/1910s_in_air_cargo", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [4, -8, -3, -5, 3, 4, 3, 8, 5, 0, -4, 2, -3, 11, -4, 0, -7, -9, -7, -1, 1, -3, 1, -3, 2, 11, 6, 2, -1, -12, -4, 1, 4, 4, 4, 6, -1, 0, 10, 5, 3, 8, 0, 1, -5, -6, -1, 9, 9, 3, 0, 7, -1, 0, 1, 1, 3, -6, 0, -9, -5, -10, -22, 10, -2, 0, -2, 2, 11, -3, -4, 10, -4, 3, 4, 4, -6, 9, 10, 1, 10, 0, -9, -1, -8, -1, -4, -3, 1, 8, -1, -7, -4, -1, -5, -8, 3, 0, 7, 36, 4, 8, 3, -2, -4, 0, -4, -6, -5, 2, -3, 0, 9, -1, -2, 5, -2, -3, -4, -5, -2, -5, 1, 3, -11, -8, 14, 0, 3, -1, 4, -1, -6, 2, 1, 0, 1, 5, 5, 2, -2, -6, -1, -8, -8, -1, 2, -3, -8, 1, 5, -3, -8, -11, 1, 0, 16, 11, 10, -5, -4, -5, 10, 3, 7, -16, 10, 8, 6, -4, 0, -2, -6, 4, 2, 5, -2, 16, -2, -4, 0, -8, -1, -10, 8, 1, 0, 1, -4, 0, 0, -7, 1, 5, -9, -3, 1, -1, 11, -7, 0, -11, 3, 0, -2, 9, 6, 0, 5, 2, 1, 1, 6, -8, 6, 0, -9, 0, -3, 5, 3, -2, -5, -29, -1, -8, 3, 6, 5, -2, -2, 0, -6, 4, -6, 2, -3, 2, 2, -2, 2, 5, -8, 0, 4, -4, -2, -4, -12, 20, -7, 3, -7, 7, -9, 7, 6, -11, -2, 17, 4, -1, 2, -3, -1, 4, 2, -5, 4, 2, 1, -5, 7, -3, -1, 0, 0, -2, -5, -8, 6, -9, 8, -3, -1, -3, 5, 4, 5, -6, -6, -1, -3, -4, 7, -5, -9, 11, -5, 6, 2, 1, -1, 5, -2, -1, -2, 2, 1, 11, -6, -8, 2, -4, -5, -2, -2, 1, -4, -35, 0, 12, -1, -1, 7, 4, 9, 3, -3, 2, -9, 7, 2, 1, 6, -1, 4, -3, -4, 3, 0, 12, -6, 0, -2, 1, 4, 4, 10, 4, -7, 12, -8, 3, 2, 5, 9, -5, -7, -9, -4, 16, -7, 12, 5, 2, -11, -9, -5, -2, 3, 4, -2, 2, 1, -8, -1, -1, 1, -2, -2, 1, -6, 11], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/World%27s_first_air_cargo_freight_flight_arriving_at_Columbus_Driving_Park_on_November_7%2C_1910_photograph_-_DPLA_-_937251bc47d6a1ba8cbb5c8eb9fee664_%28page_1%29.jpg/1280px-World%27s_first_air_cargo_freight_flight_arriving_at_Columbus_Driving_Park_on_November_7%2C_1910_photograph_-_DPLA_-_937251bc47d6a1ba8cbb5c8eb9fee664_%28page_1%29.jpg", "explanation": ["Imagine you're stuck in a small town with no road access to the next city. You need to get there quickly for an important job interview.", "Back in 1914, the first commercial flight solved this problem by connecting places like Tampa and St. Petersburg directly. The technical term for this breakthrough is \"commercial aviation.\""], "example": "A passenger flew 23 minutes from Tampa to St. Petersburg, saving time and opening new routes.", "whyItMatters": "Commercial aviation revolutionized travel by providing direct, fast connections between distant locations."}, {"id": "e7479e20044e", "title": "Colossus computer", "slug": "colossus-computer", "headline": "Did you know the first computer was built to crack secret codes?", "summary": "The first programmable computer was Colossus \u2014 built in 1943 to crack Nazi codes", "source": "The first programmable computer was Colossus \u2014 built in 1943 to crack Nazi codes", "sourceUrl": "https://en.wikipedia.org/wiki/Colossus_computer", "articleUrl": "https://en.wikipedia.org/wiki/Colossus_computer", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-12, 3, 1, -4, -2, -1, -2, 5, 0, 1, -4, 6, -3, -3, 0, 0, -8, -2, 2, 1, 9, -7, 1, -14, -4, 6, -2, -3, -3, -11, -2, 2, 17, -5, 6, 3, 0, 0, -7, 1, -9, 1, 3, -3, 6, -4, 6, 1, 1, -8, -2, 8, 10, 0, 5, -2, 4, 6, -1, -4, -7, 4, -13, 9, 4, 8, 2, -19, 4, 9, -2, 4, 0, -2, 4, 3, 1, 4, 2, 1, 2, -10, -3, 6, -13, 0, -4, 2, 2, 2, -13, 3, 2, -6, 0, -7, 0, 6, 2, 37, -2, -6, 5, -2, 10, -5, 4, -1, -2, -4, 5, 1, 10, 2, 10, -6, -2, -3, 8, 7, 3, 4, -3, -4, -5, -3, -2, 9, -2, 2, -6, -3, 6, 9, 10, 7, -3, 2, -4, -8, -10, 2, 0, -5, -9, -8, -1, 5, 3, 1, 9, -6, 2, -10, -5, 3, 15, 10, 2, -7, -3, -4, -2, 5, 6, -12, 1, 9, 0, -7, 0, 1, 0, 7, -7, 0, 0, 6, -4, 4, -6, -10, -1, -1, 3, -5, 4, 4, -3, 9, 0, 8, 0, 2, 3, 2, -4, -1, -2, -3, -6, -3, -1, 6, 1, -3, 3, -6, 3, -2, 4, -2, 3, -5, -5, -6, -5, -4, 0, 1, 4, -10, -9, -35, -9, -4, -6, -1, 0, 9, -9, -1, -1, 10, 6, -5, 3, -8, -2, 10, -5, -6, -1, 2, 0, 4, -7, -7, -4, 22, -1, 10, -1, 0, 3, 1, -5, 2, -2, 0, -1, 3, 9, -8, -4, 1, -9, 0, -8, -1, -6, -4, 2, -4, -3, -2, 3, -1, -6, -4, 0, -1, 9, 6, -5, -2, 1, 9, 5, 0, -1, 17, -3, 4, 23, 0, -6, 6, -6, 4, -3, 0, -4, 0, 2, 2, -3, 8, 2, 6, 6, -4, 5, 9, -7, -2, 2, 5, -3, -31, 5, 13, 5, -2, -2, 8, -1, -3, -1, 1, -5, -3, 1, 10, -4, 6, -4, -10, 2, 4, 7, 18, -2, 1, 1, 8, 7, -1, 12, 4, -8, -2, -1, -4, 6, -4, 0, -1, 0, -12, 3, 6, -10, 5, 4, 2, -10, 3, -4, -5, -6, 4, -5, 3, 4, -4, 2, 0, 2, -4, 2, 6, 7, -3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Colossus.jpg/1280px-Colossus.jpg", "explanation": ["Imagine you're trying to solve a complex puzzle without seeing the picture; it's frustrating and time-consuming.", "Colossus was like a super-smart friend who could quickly figure out how to solve the puzzle, making the process much faster and easier."], "example": "Instead of taking hours to solve each piece, Colossus could do it in minutes, just like magic.", "whyItMatters": "Colossus was the world's first programmable, electronic computer, revolutionizing the way we solve complex problems."}, {"id": "b54428d082c0", "title": "Printing press", "slug": "printing-press", "headline": "Gutenberg invented the movable-type printing press around 1440", "summary": "The printing press was invented by Gutenberg around 1440 \u2014 but China had movable type 400 years earlier", "source": "The printing press was invented by Gutenberg around 1440 \u2014 but China had movable type 400 years earlier", "sourceUrl": "https://en.wikipedia.org/wiki/Printing_press", "articleUrl": "https://en.wikipedia.org/wiki/Printing_press", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-9, 6, -2, 5, 1, -2, -7, 3, -9, 1, -3, 0, 2, 1, -1, 4, -3, -14, -2, -4, 15, -6, 3, -5, -3, 6, -1, 0, -2, -18, -4, -8, 5, -3, 4, -6, 2, 2, 2, -2, -3, 1, 1, -3, -1, 0, 4, 3, 0, -3, -3, 1, 2, 1, 13, 3, 8, 0, 0, -3, 1, 0, -25, 14, -4, 0, -8, -3, 1, 12, 4, 5, -4, -1, 6, -4, 1, -5, -6, -8, 5, -2, -2, 2, -9, 2, 8, -5, -4, -1, -13, 1, 1, 5, -2, -3, 5, 6, 6, 38, -10, 6, 0, -2, 8, 1, -10, 3, -3, 3, -4, 5, 3, 7, 1, -5, -3, -2, 3, 4, 3, 8, -6, -6, -12, -1, 0, 5, -2, 2, -1, -2, 1, 1, 5, -1, -9, 1, 5, -4, -9, 4, -2, -2, -7, 1, 2, 3, 7, -9, 0, -3, -6, 2, 3, 4, 5, 17, -2, -1, -1, 2, -10, 3, 0, -15, -2, -1, 2, -2, 6, 6, 0, 6, 2, 6, 0, 8, 4, 5, 3, -1, -5, -10, 5, -4, -2, -5, 5, 11, 16, 7, 3, 12, -3, -2, -5, 3, -4, -8, -10, -5, -7, 1, -5, -9, 7, 0, 9, -6, -8, 11, 0, -5, -1, -1, -4, -1, -2, 1, 5, -16, -6, -35, -2, -3, -3, 4, 1, -1, -4, 4, 1, 1, 6, -7, 8, -6, 1, 14, -8, -1, -7, -2, 4, -6, 0, 3, 4, 16, -5, -3, 1, 1, 0, 0, -6, -1, 6, 1, -7, -3, 4, 0, 3, -4, 4, 6, 3, 0, -1, -5, 5, 0, -3, -4, 10, -7, 1, -9, 4, 1, -8, -3, -6, 2, 2, -1, 2, -2, -4, 2, -6, -1, 15, -5, -6, 7, 4, 4, -3, 7, -14, 1, 9, 6, 4, -3, -5, 9, -2, -2, -5, -3, 2, -3, 1, 4, -2, -31, 3, 4, 7, 0, -2, -1, 3, 9, 7, 3, 3, -2, 5, 6, -2, 2, -2, 1, -7, 6, 8, 21, 7, -2, 0, 13, 1, 0, 3, -2, 1, 9, -5, 3, 4, -2, 6, -9, 3, -11, 4, -4, -3, 7, 4, -11, -10, 2, 4, -6, -2, 5, 7, -7, 3, 3, -2, 2, 4, 4, -3, -1, 7, 5], "explanation": ["Gutenberg's printing press could produce up to 3,600 pages a day, compared to only forty by hand-printing and a handful by hand-copying. This dramatic increase in production capacity revolutionized the printing industry and laid the foundation for modern mass communication."], "whyItMatters": "Understanding the timeline of printing technology innovations helps appreciate the historical context and impact of Gutenberg's invention on society.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/c/c3/PrintMus_038.jpg/1280px-PrintMus_038.jpg"}, {"id": "90bf4780593a", "title": "Euronext Amsterdam", "slug": "euronext-amsterdam", "headline": "The first stock exchange opened in Amsterdam in 1602", "summary": "The first stock exchange opened in Amsterdam in 1602 \u2014 to trade Dutch East India Company shares", "source": "The first stock exchange opened in Amsterdam in 1602 \u2014 to trade Dutch East India Company shares", "sourceUrl": "https://en.wikipedia.org/wiki/Euronext_Amsterdam", "articleUrl": "https://en.wikipedia.org/wiki/Euronext_Amsterdam", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-1, -9, 0, -3, -5, -2, 7, 1, 1, -2, -1, -6, -8, 2, 0, 5, -14, -9, -5, 5, 2, -14, 5, -3, 0, 2, 7, 1, 0, -18, 8, -13, 5, 7, 4, 7, -7, 4, 3, 3, -2, 6, 4, 2, 8, -4, 5, 0, -2, -4, 3, 7, 5, -8, 8, 5, 5, -1, -6, 7, 4, 1, -26, 13, 0, -5, 3, -1, -4, 1, 3, 1, 2, -5, 3, -2, -1, -4, -2, 3, 10, -1, 0, -3, -8, -1, 7, -2, 2, -3, 4, 3, -7, -3, 2, 4, 3, 9, 12, 38, 6, 4, -1, 3, 1, -1, -8, -6, 9, 3, -4, -1, 4, -6, 1, -5, -1, -8, 1, 3, 11, 5, -3, -2, -10, 3, 7, 4, 3, -4, -3, 1, -4, 0, 6, 7, -1, 3, 1, -1, -12, -15, -3, -6, -1, 2, 9, -6, -3, -1, -4, 1, -9, -11, 0, -2, 11, 6, 3, -3, -5, -6, -7, 9, 3, -13, -6, 2, 5, 6, 5, 6, 0, 2, 3, 1, 5, 0, -6, 1, -1, -9, -4, 4, 1, -2, 1, 3, 0, 8, 2, 4, -5, 11, -1, -1, -10, 9, 2, -3, 8, -5, -4, 7, 0, 7, 13, -2, 0, -5, -7, 7, 7, -5, 2, -2, -3, 3, 4, 5, 3, -6, 1, -35, -5, -6, -7, 2, 0, -2, -7, 1, -1, 7, 3, 1, 9, -1, 1, 3, 3, 5, -3, 0, 2, -1, 5, 7, 2, 14, -8, -4, -4, 6, 1, -1, -5, 0, 1, 8, -2, -4, -2, 0, -10, -1, 1, 6, 2, 0, -6, 0, 5, 6, -2, 7, 14, 0, -12, -6, -1, 0, 6, -7, -3, -6, -6, 1, 0, -4, -4, -4, 0, -10, 1, -3, -7, -1, 3, -1, 5, 2, 10, 1, -2, 6, 8, -6, 9, 10, -1, -1, 4, -9, -3, -12, 5, 8, -6, -34, 1, 3, -2, 5, 2, -3, 2, -2, 3, 11, -16, 6, -2, -2, -4, 5, 4, -1, 1, 8, 4, 20, 4, -1, 2, 1, 1, -1, 0, 4, -2, 3, -2, 5, 2, -4, 4, -2, -2, -2, -5, -5, 5, 0, 5, 8, -15, 5, -4, -3, -7, -4, 4, -1, -11, -8, -5, 2, -3, 5, 2, -4, -2, 9], "explanation": ["The Amsterdam Stock Exchange's legacy continues through its successor, Euronext Amsterdam. Euronext merged with other exchanges in 2000, creating a pan-European stock exchange network."], "whyItMatters": "Understanding the origins of the Amsterdam Stock Exchange helps appreciate the evolution of global financial markets.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/20220525.Amstedam.-028.jpg/1280px-20220525.Amstedam.-028.jpg"}, {"id": "b2c434670f7a", "title": "Discovery of penicillin", "slug": "discovery-of-penicillin", "headline": "Alexander Fleming discovered penicillin by accident in 1928", "summary": "The first antibiotic penicillin was discovered by accident in 1928 \u2014 Alexander Fleming left a petri dish uncovered", "source": "The first antibiotic penicillin was discovered by accident in 1928 \u2014 Alexander Fleming left a petri dish uncovered", "sourceUrl": "https://en.wikipedia.org/wiki/Discovery_of_penicillin", "articleUrl": "https://en.wikipedia.org/wiki/Discovery_of_penicillin", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, 0, 4, -5, 0, -1, 5, 10, -5, -2, -3, -12, 4, 3, -6, -1, -12, 1, -2, -1, 0, -1, 1, -8, 3, 12, 7, -5, -4, -25, -1, 3, 1, -9, 4, 6, -1, 5, 1, 6, 5, 1, 3, 6, 0, -1, -1, 3, 16, -10, -3, 4, 8, 5, -1, -5, 0, 6, -6, 1, 0, 0, -23, 5, 0, -1, -4, -4, 3, 4, -4, 3, 2, 5, -1, -1, -3, -4, 5, 1, 6, 2, 4, 4, -7, -8, 3, -5, 7, 10, 0, -1, 0, -1, -8, -4, 1, 9, 6, 49, -15, -2, -3, -2, 2, -1, 6, -6, 1, -4, 11, 4, 3, -4, 4, 0, 8, -1, 1, -2, 2, -7, 5, -2, -9, 5, -3, 6, 0, -7, 1, -7, 1, -6, 14, 7, -1, -6, 0, -6, -7, -7, -8, -5, -6, 2, 1, -1, -6, -5, -3, 0, -6, 5, 8, -2, 15, 4, 0, -1, -7, -3, -10, 14, -3, -5, 3, 0, 4, 0, -1, 3, -1, -1, -14, 9, 3, 3, 3, -3, 4, 2, 3, 0, 0, -2, -5, 4, 5, 7, 0, 5, 2, 2, -9, 1, -9, 10, 2, 1, -10, -7, -3, 4, 4, -3, 7, 0, 1, 4, -4, 11, -9, 5, 0, 0, -4, 2, 4, 4, 8, -7, -5, -37, -8, 3, -2, 6, -6, -1, -9, -3, -2, 1, 5, -3, 6, -6, 5, 11, -3, -2, -6, 0, -2, 3, 8, 3, -5, 16, 2, 0, 7, -3, 0, -2, -6, -2, 8, 7, 0, -10, -2, -1, 2, -9, -2, -3, -1, -3, -8, 4, 8, 3, 1, 2, 5, -1, 0, -3, -1, -6, 3, -5, 0, 3, 0, -4, 1, -5, -2, 6, 0, 3, 13, -2, -7, -3, 4, 3, -6, -5, -2, -6, 0, 3, -5, -2, 1, -2, 2, 0, 0, 3, 2, -2, 0, 9, 4, -28, 11, 10, 4, 1, 6, -2, -2, 2, 2, 10, -6, 7, 3, -1, 1, 3, -2, -8, -2, 7, 8, 15, -5, -5, 0, -2, 3, -3, 7, 1, 1, -3, -2, 7, 6, -2, -3, -8, -4, -7, -5, -1, -3, 11, -1, 2, -8, 7, 1, -6, -6, 4, 6, 7, -10, -2, 1, -2, 3, 2, -5, 1, 0, 8], "explanation": ["The accidental discovery of penicillin by Alexander Fleming in 1928 revolutionized medicine by providing an effective treatment for bacterial infections. This breakthrough led to the development of antibiotics, significantly reducing mortality rates and transforming healthcare. Fleming's initial observation and subsequent research paved the way for modern antibiotic therapies."], "whyItMatters": "Understanding the accidental nature of Fleming's discovery highlights the importance of serendipity in scientific breakthroughs, emphasizing the need for careful observation and documentation in research.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Sample_of_penicillin_mould_presented_by_Alexander_Fleming_to_Douglas_Macleod%2C_1935_%289672239344%29.jpg/1280px-Sample_of_penicillin_mould_presented_by_Alexander_Fleming_to_Douglas_Macleod%2C_1935_%289672239344%29.jpg"}, {"id": "c12ad1866609", "title": "Smallpox vaccine", "slug": "smallpox-vaccine", "headline": "Edward Jenner created the first vaccine in 1796", "summary": "The first vaccine was for smallpox in 1796 \u2014 Edward Jenner used cowpox to create immunity", "source": "The first vaccine was for smallpox in 1796 \u2014 Edward Jenner used cowpox to create immunity", "sourceUrl": "https://en.wikipedia.org/wiki/Smallpox_vaccine", "articleUrl": "https://en.wikipedia.org/wiki/Smallpox_vaccine", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-6, 7, 3, 0, -5, -2, 10, 11, -7, 1, 1, -8, 0, -4, 2, -1, -12, -4, -4, 1, 2, -5, -2, -8, 0, 3, 0, 0, 7, -17, -1, -11, 1, -3, -5, 2, 5, 2, -3, 4, 0, 6, 2, 9, 0, 0, -5, 2, 9, -5, 4, -2, 5, 3, 8, 2, -1, 3, 2, 10, -4, 6, -23, 16, 3, 3, -4, 0, 3, 8, 0, 5, -2, -1, 4, 0, 4, 2, 6, -5, 8, 1, 6, -1, -4, -8, 3, -8, 3, 17, -1, 2, -4, 0, -9, -1, 3, 8, 3, 41, -9, -8, -4, -4, 8, -9, 2, -9, 4, 0, 1, 1, 7, -3, 5, 1, 1, -1, 6, 3, 11, 0, 3, -3, -1, 5, 5, 12, -3, -5, 4, 3, 5, -4, 4, 5, -3, -4, 5, 0, -3, -7, -8, -9, -6, -8, 1, -2, -7, -8, -1, 1, -6, 3, -2, 2, 4, 2, -9, -5, -6, -1, 0, 4, 3, -12, 2, 8, 4, 2, 7, 4, -3, 3, -1, 2, -6, 1, 0, 1, 7, -12, 1, 3, -5, -5, -2, 7, 5, 8, 9, 4, -4, 2, -4, -4, -5, 2, 2, -5, -3, -13, -4, 13, -2, -4, 7, -3, 13, -8, 1, 11, -1, -4, -6, 3, -5, -2, 4, 4, 10, 0, -3, -38, -5, -2, 1, 3, 0, -2, -10, -4, 4, -2, 2, -8, 6, -8, 4, 12, -10, 5, -6, 1, -1, 1, 2, 0, 0, 17, 15, 2, 5, 0, 6, 2, -1, -7, -2, 1, 6, -4, -4, 0, -6, -2, 2, 1, 0, -3, 2, 3, 1, 2, -3, 7, 4, 4, -4, -6, 8, -1, 4, -2, -6, -5, -4, -11, -1, -1, -1, 1, -7, -8, 16, -4, -10, 3, -1, 8, -3, -1, -4, 0, 0, -3, 1, 1, 1, 3, 6, 4, -3, 5, -2, -4, 3, 3, -1, -28, -3, 9, -2, -4, -1, -4, -5, 6, -4, 8, -6, 8, 4, -5, -2, -3, -6, -3, -7, 7, -6, 17, 2, -9, 4, 5, 4, 0, 1, 4, -4, 3, 1, 2, 6, 4, -5, -9, 7, -10, 2, 5, -6, 8, -2, 2, -7, -6, -2, -6, -2, 11, 1, -4, -5, 1, 8, -11, 3, -1, -4, -6, 11, 4], "explanation": ["The term \"vaccine\" originates from \"vacca,\" the Latin word for cow, highlighting the connection between cowpox and smallpox vaccination. Jenner's work with cowpox was instrumental in developing the first effective vaccine. This discovery marked a turning point in the fight against infectious diseases."], "whyItMatters": "Understanding Jenner's pioneering work with cowpox is crucial for appreciating the origins of modern vaccination and its impact on global health.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Smallpox_vaccine.jpg/1280px-Smallpox_vaccine.jpg"}, {"id": "8bc3040a80e8", "title": "Your body has about 37.2 trillion cells", "slug": "your-body-has-about-37-2-trillion-cells", "headline": "Did you know your body has more cells than stars in the Milky Way?", "summary": "Your body has about 37.2 trillion cells \u2014 more than stars in the Milky Way", "source": "Your body has about 37.2 trillion cells \u2014 more than stars in the Milky Way", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_human_cell_types", "articleUrl": "https://en.wikipedia.org/wiki/List_of_human_cell_types", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [1, -11, 5, 0, 5, 1, 10, 5, 13, 0, 7, -12, 2, -3, -3, -7, -1, -7, -17, 6, 2, -2, -3, -2, 4, -7, -3, -10, -6, -21, 1, 3, 7, 1, -7, -5, 4, -2, 2, -1, -1, -1, 9, 2, 3, 1, -5, 6, 12, 2, -2, -4, -1, 19, -5, -1, -5, 9, 4, 4, -1, 2, -9, 1, 6, -9, -7, -1, 1, -3, 2, 5, 1, 3, -1, -6, -2, 0, 4, -4, 2, 5, 2, -3, -12, -7, 0, 3, -9, 6, -7, -1, -4, 4, -4, -8, 3, 3, 3, 45, -6, -6, 4, 5, 0, -2, 0, 9, 2, 5, 3, 2, -3, -1, 3, 1, 14, -10, 2, -2, -1, -7, 9, -4, 14, -1, 4, 9, 5, -1, 5, 6, -5, 0, 0, -2, 6, -4, 3, -1, 5, -4, 7, -9, -9, 12, 4, -5, -2, 1, 5, 8, 2, -2, -2, 6, 2, 2, -5, -4, 8, 9, 3, 9, 12, -2, -7, -5, 4, -7, 6, -4, -5, 2, 12, -1, -8, 0, 3, 9, 4, 2, 3, 8, -1, -2, -5, 8, -4, -1, -1, 4, -2, 2, -4, -7, -2, -5, -5, 1, 3, -3, -1, 3, 3, 2, 2, 1, 6, 4, -6, 0, 1, -3, -5, 4, -2, -7, 2, 2, 5, -11, -11, -35, -3, -2, -9, 4, 4, 6, 1, 4, 1, 1, -1, -5, -7, -4, 2, -1, -1, -1, -2, 3, 1, -4, 6, 2, -2, 17, 2, -2, 2, 6, 0, 1, -7, 1, -3, -7, -4, -4, -1, -7, -5, -9, -8, -5, -2, 0, 0, -7, -7, -2, -2, -6, -1, 4, 1, -13, -3, -11, 16, -3, 0, -3, -5, 5, 1, -4, 2, 5, -10, 5, 11, -3, -3, 4, -4, 2, 7, -6, -1, 4, -2, 3, -1, 4, 6, 3, -2, -2, -7, 6, 0, -6, -8, -6, 3, -28, 10, 1, 8, -7, -4, 7, 5, 9, 4, 2, -1, 6, 6, 6, -6, 7, -3, 4, -1, 6, -4, 14, 3, 0, 12, 1, 11, 6, -3, 6, -1, -1, -2, -2, 6, 2, 1, -1, -2, 9, -2, -4, -2, 13, -3, 4, -9, 0, -15, -10, -3, -7, 1, 4, 1, -1, -7, 4, -4, -1, 0, -1, 6, -3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Khalili_Collection_Islamic_Art_sci_0430_back.jpg/1280px-Khalili_Collection_Islamic_Art_sci_0430_back.jpg", "imageLicense": "CC BY-SA 3.0 igo", "imageArtist": "Khalili Collections", "explanation": ["Imagine you're at a crowded concert, feeling overwhelmed by the crowd. Now, think about your body being like that concert, filled with countless cells working together.", "Each cell in your body is like a person at the concert, doing their own unique job to keep everything running smoothly. The technical term for this is the \"human cell count.\""], "example": "If there are 37.2 trillion cells in your body, that's like having 37.2 trillion people at a concert, each doing something different.", "whyItMatters": "Your body is a bustling city of 37.2 trillion cells."}, {"id": "078adea1defa", "title": "You shed about 1.5 million skin cells per hour", "slug": "you-shed-about-1-5-million-skin-cells-per-hour", "headline": "Ever wondered how much skin you lose every day?", "summary": "You shed about 1.5 million skin cells per hour \u2014 roughly 4 kg per year", "source": "You shed about 1.5 million skin cells per hour \u2014 roughly 4 kg per year", "sourceUrl": "https://en.wikipedia.org/wiki/Skin", "articleUrl": "https://en.wikipedia.org/wiki/Skin", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [0, 0, 7, 8, -2, -5, 13, -1, 5, 5, 7, -13, 6, 5, -6, 2, 8, -6, -14, 3, 9, -8, -1, -5, -2, -11, -3, -10, -5, -12, 3, -9, 0, 4, -3, 4, -4, 5, 1, 6, 1, 7, 2, 2, 7, 6, -9, 7, 10, 10, -3, 4, 2, 17, -2, -4, 2, 6, 11, 7, -3, 2, -5, 5, 4, -3, 0, 2, 5, 3, -9, 3, 6, -1, -4, -1, -2, -3, -3, -3, -2, 6, -2, -3, -7, 0, -1, 0, -3, 4, -7, 3, -2, 3, -6, -3, 2, 7, -6, 41, -3, -11, -2, 5, -1, -3, -3, 5, -1, -4, 8, -1, 1, -3, 5, -1, 10, 1, -3, 8, -5, 0, 6, 7, 6, 7, 11, 10, 4, 5, 8, 4, -3, 1, -6, -3, -1, -1, 2, 0, 5, -3, -2, -8, 5, 9, 9, 0, 2, -4, 5, 1, 2, -6, 6, -1, 0, -3, 2, -7, -2, 2, -4, 4, 8, -7, -4, -1, 1, -8, 5, 5, -5, -1, 5, -5, -8, 0, 9, 3, 8, 6, 4, 0, -4, 0, 3, 2, 4, 0, -2, -5, -10, -2, -4, -1, -5, -8, -8, 4, 5, -6, -2, 5, 3, 1, -5, 1, 16, 10, -8, 3, 5, -5, 2, -3, 4, 2, 10, -4, 10, -11, -6, -35, 4, -2, -10, 5, 2, 0, -9, 6, -4, 7, 3, -5, -3, 1, 7, 3, 2, 1, -7, 6, -3, 1, -4, 7, 1, 13, -5, 0, -2, 3, -5, 1, -13, -2, -2, -5, -7, -3, -1, -10, -9, -8, -8, -10, 1, -9, -2, -3, -2, 8, -6, 1, -4, 0, -5, -4, 1, -8, 5, -8, -3, 4, -4, 6, 2, 2, 8, 0, -10, -1, 11, 7, -6, 2, 0, 1, 4, -4, -6, 7, -6, 3, 4, 9, 10, 0, -5, -1, -4, 4, 0, -6, -6, -7, -3, -28, 8, -3, 9, -6, -9, 4, 9, 2, -1, 7, 1, 1, 1, 10, -9, 2, 0, -1, 4, 0, -2, 12, 1, 2, 11, -13, 3, 9, -5, 5, -3, 6, 1, -4, -3, -3, -3, -2, -2, 5, -11, 8, 3, 17, 0, -3, -16, 2, -5, -8, -5, 1, -3, 4, 6, -6, -1, 5, -7, 1, -4, -13, -3, -5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/East_and_West_Shaking_hands_at_the_laying_of_last_rail_Union_Pacific_Railroad_-_Restoration.jpg/1280px-East_and_West_Shaking_hands_at_the_laying_of_last_rail_Union_Pacific_Railroad_-_Restoration.jpg", "imageLicense": "Public domain", "imageArtist": "Andrew J. Russell / Adam Cuerden", "explanation": ["Imagine you're brushing your teeth for the first time. You notice tiny flakes falling off your gums.", "Your body sheds skin cells continuously to maintain healthy skin. This process is called desquamation."], "example": "You shed about 1.5 million skin cells per hour.", "whyItMatters": "Desquamation helps remove dead skin cells and keeps your skin healthy."}, {"id": "ca61f69f277c", "title": "List of common misconceptions about science, technology, and mathematics", "slug": "list-of-common-misconceptions-about-science-technology-and-mathematics", "headline": "Did you know your brain uses a lot of energy but weighs very little?", "summary": "Your brain uses 20% of your body's energy but is only 2% of your weight", "source": "Your brain uses 20% of your body's energy but is only 2% of your weight", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_common_misconceptions_about_science,_technology,_and_mathematics", "articleUrl": "https://en.wikipedia.org/wiki/List_of_common_misconceptions_about_science,_technology,_and_mathematics", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [1, -3, -2, -5, -4, 6, 11, -2, 7, -2, 9, -10, -1, 6, 0, 3, 1, -4, -10, 3, -1, -4, 3, 6, -2, -6, -3, 4, -5, -17, 8, -3, 7, 0, -5, 2, -3, 1, -1, 1, 2, 0, 6, 0, 5, 6, -2, 3, 9, 11, 1, 5, 0, 13, 1, 3, 1, 3, 3, 3, -8, 9, -11, -1, 2, -6, -8, -5, -6, 1, -1, 6, 2, -3, -1, -9, -2, -9, 2, -10, 3, 1, -3, -4, -2, 7, -5, 4, -1, -2, -4, -3, -7, 6, 4, 0, 2, 7, -8, 46, 0, 10, 6, 6, 2, 1, 0, 0, 1, 7, 3, 6, -2, 2, 9, -4, 6, 0, 3, -3, -10, -1, 10, -2, 6, -6, 2, 11, 3, -4, 6, -4, -2, 1, 1, -6, 5, -3, 2, 7, 9, 1, -1, -18, -13, 18, 5, -5, -6, 3, 1, 0, -5, -2, 3, 1, 1, -6, -2, -6, 0, 3, -7, 2, 9, 2, -7, -4, 2, -7, 3, -1, -3, -7, 11, -1, -5, 0, 0, 3, 15, 1, -6, 6, -2, -4, -2, -3, -2, 0, -2, 1, -3, -3, -3, -3, 2, -1, -8, 3, 4, -3, -1, 11, 3, 3, 1, -3, 9, 7, 2, -7, -3, -2, -5, 3, 2, 1, 5, -1, 7, -10, -13, -34, -2, -1, -6, 8, -2, 4, 2, -4, 1, 2, -4, -3, -7, -5, 1, 5, -2, -7, -3, 5, -5, -3, -6, 13, -2, 16, 1, 6, 0, -1, -4, 1, -8, 6, -9, -4, -5, -7, -1, -15, 2, -7, -8, -12, -5, -2, -7, -2, -5, 5, 6, -1, 1, 5, -4, -14, 0, -8, 8, -6, -8, -2, -1, 0, -1, -1, 2, 7, 7, 7, 9, 1, 3, 10, -2, 1, 1, 4, 6, 0, -2, -3, 4, 2, -5, 0, -12, 4, -3, -5, 4, 1, -4, -2, 2, -27, 10, 1, 9, 4, 4, 4, 9, -10, 0, 1, -5, 7, 4, -1, -6, 8, -6, 1, 0, -5, 10, 16, 4, -3, 6, -6, 10, 7, 4, -2, 0, 0, -11, 3, 3, -12, -6, 5, -7, 11, 0, -5, 1, 10, -8, -3, -6, 1, -3, 2, -3, 4, 2, 11, 3, -3, 2, 5, -8, -4, 5, 2, 7, 0], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/9/94/Lagos44.jpg", "imageLicense": "CC BY 2.5", "imageArtist": "Georges Jansoone", "explanation": ["Imagine you're trying to lose weight, but every time you think about it, you eat a whole pizza. Why does your brain seem to make you hungry even when you're not hungry?", "Your brain is like a tiny computer that needs a lot of power. Even though it's only 2% of your weight, it uses 20% of your body's energy. This means it's always working hard, which can make you feel hungry."], "example": "If your brain weighs 2 pounds and uses 20% of your body's energy, it uses the same amount of energy as if you weighed 40 pounds.", "whyItMatters": "Your brain's high energy demand explains why it can influence your hunger, even when you're not physically hungry."}, {"id": "eac9fb78c4a2", "title": "Boric acid", "slug": "boric-acid", "headline": "Did you know your stomach can dissolve metals?", "summary": "Stomach acid (pH 1.5-3.5) is strong enough to dissolve metal \u2014 your stomach lining replaces itself every 3-4 days", "source": "Stomach acid (pH 1.5-3.5) is strong enough to dissolve metal \u2014 your stomach lining replaces itself every 3-4 days", "sourceUrl": "https://en.wikipedia.org/wiki/Boric_acid", "articleUrl": "https://en.wikipedia.org/wiki/Boric_acid", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [3, -4, 4, 4, 2, -8, 9, 1, -8, -3, 3, -10, 2, 2, -1, -3, 0, -3, -13, -3, 0, 4, -5, -4, 7, 2, -2, -3, -6, -21, 4, -5, 1, -1, -3, 5, 0, 8, -2, 10, 8, 2, 2, -4, -1, 1, 3, 3, 15, 10, 3, 4, 3, 10, 1, -5, 0, 0, 3, -2, -4, 1, -12, 3, 6, 0, -7, -6, 9, 10, -8, 6, -6, 4, 3, 1, 7, -9, 1, -1, -9, -2, -5, -9, 0, 4, 3, 10, -5, 4, -1, -5, 0, 2, -2, -6, -2, -3, -3, 42, -10, 4, -6, -5, -1, 9, 9, 0, -4, 0, 5, 4, 5, -11, 4, 8, 3, -5, 5, -3, -9, -3, 1, 4, -1, -2, 3, 6, 0, 3, -1, -8, -2, -4, -8, 1, 7, 4, 1, -4, -10, -11, -5, -11, 0, 8, 0, 1, 0, -8, -12, 1, 6, 5, 5, 0, 4, -7, 2, -2, 0, -5, 0, 6, 10, 3, -4, -6, 4, -5, 2, 2, -4, -2, 4, -3, 0, 4, 6, -1, 12, 5, -4, 6, 2, 0, -5, 6, 5, 5, -1, 4, -6, 0, -5, -3, -3, -2, -6, 1, 7, -4, -7, 5, 3, 4, 4, 6, 2, 0, 5, 10, -4, -5, 3, -5, 3, -6, 2, 5, 10, -9, -6, -35, 0, 0, -2, 17, -4, 4, -7, 4, -3, 4, 4, 0, 1, 0, -1, 6, -5, 7, 5, 1, -6, -2, -4, 5, 3, 21, -2, -2, -6, 0, -3, 0, -9, -4, -4, -7, -9, -7, -2, -9, -5, 0, -4, -4, 2, 0, 8, 1, 0, 2, 3, -3, -1, -4, 2, 4, 7, -14, -2, -11, -2, 7, 7, 3, 3, 8, 3, 3, -4, 3, 15, -6, -9, 12, 3, -7, 9, 0, -8, 0, -2, 11, 2, 3, 9, 2, -7, 0, 1, 6, 1, -8, -2, 0, -4, -34, 8, 6, 5, 0, 3, 5, 6, -11, 6, -3, 2, 4, -4, 5, -4, 7, -11, -4, -1, 2, -3, 15, 1, 1, 5, 4, 3, 9, -1, 1, -4, -1, 1, 5, 6, -9, -1, -7, 1, -3, -2, 1, -5, 4, -12, -2, -13, 1, -6, -2, -9, 6, 5, -1, 3, -1, 7, 5, 1, 3, -3, 0, 1, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/4/44/Boric_acid.jpg", "explanation": ["Imagine accidentally swallowing a small coin while eating.", "Your stomach acid, with a pH between 1.5 and 3.5, is strong enough to dissolve metals. This is why your stomach lining replaces itself every 3-4 days."], "example": "The coin would dissolve due to stomach acid, not because the stomach lining absorbs it.", "whyItMatters": "Stomach acid's strength protects you from metal objects."}, {"id": "faf50fbab5cc", "title": "Concrete", "slug": "concrete", "headline": "Human bones are stronger than concrete \u2014 ounce for ounce, bone is stronger than steel", "summary": "Human bones are stronger than concrete \u2014 ounce for ounce, bone is stronger than steel", "source": "Human bones are stronger than concrete \u2014 ounce for ounce, bone is stronger than steel", "sourceUrl": "https://en.wikipedia.org/wiki/Concrete", "articleUrl": "https://en.wikipedia.org/wiki/Concrete", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, -4, 3, 2, 4, -2, 6, 6, -3, -5, -1, -8, 3, -5, 1, 2, -5, 1, -15, 5, 7, -4, 2, -10, 5, 6, -7, 0, 5, -21, 3, 1, 7, -5, -2, 4, -2, 1, 4, 10, 12, 5, -5, 1, -3, 14, 2, -2, 4, 7, 6, 2, -5, 6, 1, -4, 7, 7, 4, -1, 5, -2, -12, 6, 8, 5, -4, 0, -4, 4, 2, 8, 4, 5, -2, -7, -3, -6, 5, -6, -5, 0, -3, -6, -3, -5, -6, -4, 0, 4, -5, 1, 4, 12, 3, 5, 2, 3, -8, 47, -6, 7, -1, -5, 7, 1, 7, -2, -4, 7, 9, 3, -4, 2, -2, -3, 7, -8, -1, -4, -2, -1, 8, -4, 0, -5, -6, 7, 5, 1, 5, -11, -1, -7, -1, 1, 5, -2, 2, 5, -1, -9, 4, -6, -5, 9, -3, 5, 0, -7, -5, 0, -1, 2, -4, -6, -3, -3, -5, -6, 6, 4, -4, -8, 6, -7, -5, 3, 12, -12, 10, -3, -4, 3, 10, 2, 0, -6, 3, 8, 7, 2, -3, 7, 4, 0, -5, 2, 4, 2, 7, 5, -8, 2, -7, -4, 7, 3, -3, 3, 5, 2, -1, -3, 6, 4, -1, 2, 2, 3, -2, -3, -3, 1, 0, -9, 7, -2, 1, 1, 2, -10, -5, -40, -6, 4, 0, 8, -1, 13, -2, -8, -4, -2, 3, 2, -6, 4, 2, 5, -3, 4, 0, 0, -5, -8, -6, 2, -2, 18, 0, -5, 2, -4, -3, -2, -11, 1, 0, 1, -8, -6, 4, -9, 2, 2, -3, -3, -5, 2, -1, 0, -1, 4, 11, 4, -1, -10, 1, -4, 1, -6, 2, -1, -10, 5, 4, 4, -3, 4, -3, 0, -1, 3, 8, -5, -4, 7, 4, -5, -2, 7, 3, 5, 4, 2, 2, 9, 0, 7, 3, -1, 0, 4, -2, -3, -14, -7, 2, -36, 1, 10, 1, -5, -8, 3, 2, -2, 1, -2, -2, 0, -4, -6, -6, 9, 1, 0, -5, -4, 2, 17, -4, -2, 5, 3, 3, 2, -3, 3, -4, 3, -2, -5, 8, -2, -1, 4, -4, -1, -3, -8, 5, 12, -6, 4, -11, 6, -7, -7, -1, 7, -4, -1, -3, 1, -2, 6, -3, 1, 8, -7, 12, 5], "explanation": ["The comparison between bone and concrete highlights the efficiency of biological materials in nature. Bones are not only stronger per ounce but also more adaptable to various stresses compared to concrete. This fact underscores the remarkable design of human skeletal systems."], "whyItMatters": "Understanding the superior strength of bones compared to concrete can inspire biomimetic designs in engineering and architecture.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/b/b4/Bloczek_betonowy.jpg"}, {"id": "eef97df4cb92", "title": "I Miss You (Blink-182 song)", "slug": "i-miss-you-blink-182-song", "headline": "You blink about 15-20 times per minute \u2014 roughly 1,200 times per hour", "summary": "You blink about 15-20 times per minute \u2014 roughly 1,200 times per hour", "source": "You blink about 15-20 times per minute \u2014 roughly 1,200 times per hour", "sourceUrl": "https://en.wikipedia.org/wiki/I_Miss_You_(Blink-182_song)", "articleUrl": "https://en.wikipedia.org/wiki/I_Miss_You_(Blink-182_song)", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-8, 1, 2, 1, 3, 3, 14, -4, 8, -2, 3, -5, -2, 5, 0, 5, -2, -14, -2, -6, 7, -6, 0, -3, -6, 5, 0, 3, -2, -15, 3, 0, 0, 0, -6, 2, -11, 3, -4, -3, 0, 3, -2, -6, -6, -2, -13, 1, 10, 1, -11, 1, 8, -2, -6, -7, 7, 7, 3, -11, 4, 5, -2, 2, 2, -8, 0, -5, -4, 4, -9, 1, -3, -1, 7, -8, -2, -2, 9, -1, -3, 0, -8, -1, 12, 0, 0, 7, 2, 0, -1, -2, -12, -5, 2, 1, 5, -1, -7, 45, -2, 7, 6, 6, 1, -5, 3, -1, -4, 9, 4, -4, 11, -3, 2, 7, 8, 1, 8, -2, -2, 4, 4, -4, -4, 0, 12, 12, 0, 7, 9, -11, 7, 1, 6, -1, -2, -3, -1, -2, 7, -15, 6, 0, 2, 11, -3, 3, -5, -3, -3, -1, -3, -7, 2, -1, 3, 4, 6, 0, -5, 3, 6, 0, 8, 0, -5, -4, -5, -3, 3, 4, 1, -1, 8, 1, 3, 4, 5, 5, 8, -4, -4, 9, 0, 0, -5, -1, -2, -5, 2, -6, -14, 4, -7, -4, 1, -6, -1, 1, 7, -8, -2, 4, 7, 5, -3, 4, 6, -1, -5, -4, 9, -3, -4, -2, -5, 5, 4, 3, -1, -6, -6, -30, 2, 3, -2, 6, -5, -3, -3, 12, -2, 2, -15, -3, -7, 6, 10, -10, 7, -1, -3, 1, 3, -1, -6, 3, -3, 13, -2, -6, 0, 2, -8, 6, -8, 2, 6, 1, 0, -4, 4, -11, 7, -7, 0, -8, -6, -2, -1, 7, -3, 5, -5, -4, -3, 0, -16, -7, -9, -2, 3, -1, 1, 7, -6, 0, 0, -1, -3, -1, 5, -4, 16, -1, -12, 8, -5, 2, 1, 1, -4, 2, -2, -2, 3, -5, -4, 4, -3, -1, 9, 6, 4, -6, 0, 2, -4, -36, 2, 4, 5, 0, 1, 10, 5, -2, -4, -12, 5, 6, 5, 8, 4, 9, 0, -1, -4, 6, 0, 20, -1, -1, 9, 3, 4, 8, 3, 3, 6, -4, -4, 3, 1, -9, 2, -1, 6, 7, -6, 5, 1, 11, -6, -8, -7, -6, -1, -6, -3, 10, -4, 2, 2, -7, 10, 2, -4, -3, -2, 10, -2, 5], "explanation": ["Awareness of blinking frequency can be beneficial in various contexts, such as when using digital devices for extended periods. Knowing that the eyes blink around 1,200 times per hour can encourage regular breaks to prevent eye fatigue and discomfort. This knowledge can also be useful for individuals with conditions like dry eye syndrome, who may need to pay extra attention to their blinking habits."], "whyItMatters": "Understanding the frequency of blinking helps us appreciate its importance for eye health and can inform our habits to prevent eye strain and discomfort.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/2/21/Bleachedcoral.jpg", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Acropora at English Wikipedia"}, {"id": "66d946aaa6dd", "title": "The human nose can detect about 1 trillion different scents", "slug": "the-human-nose-can-detect-about-1-trillion-different-scents", "headline": "Human nose detects ~1 trillion scents", "summary": "The human nose can detect about 1 trillion different scents", "source": "The human nose can detect about 1 trillion different scents", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [2, 1, 6, -2, 3, 1, 17, -7, 3, -5, -2, -5, -1, 4, 6, -2, 1, -7, -8, 2, 15, 2, 2, -3, -5, 3, 0, -6, -5, -21, 7, -2, 1, -2, 1, -2, -4, -1, -1, 3, 0, -1, 2, -6, -1, 0, -9, 11, 0, -6, 2, -2, 0, 11, -5, -2, 2, 5, -1, -4, 3, 4, -12, 1, 4, -1, -6, -4, 0, 3, -2, 5, -4, -7, 0, 0, -3, -6, -3, 0, 0, 6, 1, -4, -1, -4, 0, 3, -10, -2, -1, 3, -6, 2, -4, -1, 2, 2, 5, 41, -1, 1, -2, -12, 1, 3, -2, -1, -2, 3, 2, -3, -2, -2, 0, 6, 11, 1, 1, -3, 0, -4, 8, 0, 4, 3, 3, 18, 0, 10, 3, -3, 4, -2, 5, 6, 0, 5, -1, 13, -4, -5, 7, -9, -9, 9, 1, 5, -5, 3, 8, 9, -8, -6, 9, -1, -2, 1, 0, 5, 3, 2, 7, -2, 0, -12, -2, -2, 7, -4, 7, 0, -1, 3, 1, -3, -6, 3, 1, 4, -4, 4, 1, 6, 7, -2, 1, -2, 1, 5, 7, -1, -5, 2, -1, -3, -1, 3, -5, 4, 4, -7, -9, -2, 8, 3, -1, 1, 10, -3, -2, 4, 1, -1, -1, -4, 4, 3, 4, -5, 1, -7, -8, -41, -1, 9, 1, 8, -3, 5, -2, 7, 1, 0, 1, 2, 3, -3, 13, -3, 4, 0, 6, 1, -1, 7, -1, -1, 0, 19, 1, -11, 3, -3, -1, -1, -9, 4, 7, -3, 0, -2, -5, -6, 1, -7, -4, -4, 1, -5, -2, -9, -3, 11, 2, -1, -2, -8, -12, -3, -10, -9, 8, -1, -3, 0, -3, 3, 1, -5, -3, 13, -3, -1, 21, -2, -8, -1, -2, 5, -9, -12, 3, 12, -5, -2, 1, -7, 1, 1, -5, 0, 0, 9, 2, -2, -13, 2, 1, -32, -4, 0, 10, 0, -1, 1, -2, 4, -4, -2, 3, 6, 6, 9, 0, 3, -1, 2, -1, 2, 5, 25, 3, -7, 3, 2, 2, 0, -6, -1, -4, 0, -9, 1, 11, -1, -8, 2, 3, 0, -5, 0, -5, 13, -7, -2, -5, -4, -4, 0, -4, 8, -5, 1, 8, -7, -10, -3, -4, -3, 6, -5, 4, 4], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Cooke_and_Wheatstone_electric_telegraph.jpg/1280px-Cooke_and_Wheatstone_electric_telegraph.jpg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "Geni"}, {"id": "cd4bb7a1fb76", "title": "Your DNA stretched end to end would reach the Sun and back over 600 times", "slug": "your-dna-stretched-end-to-end-would-reach-the-sun-and-back-over-600-times", "headline": "Did you know your DNA could stretch to the Sun and back over 600 times?", "summary": "Your DNA stretched end to end would reach the Sun and back over 600 times", "source": "Your DNA stretched end to end would reach the Sun and back over 600 times", "sourceUrl": "https://en.wikipedia.org/wiki/DNA", "articleUrl": "https://en.wikipedia.org/wiki/DNA", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 1, 2, 6, 1, 6, 9, -5, 7, -6, 4, -5, -1, 4, -1, 0, -6, -1, -15, 1, 9, -2, 1, 1, 0, 5, -4, -6, -8, -18, 0, 1, -4, -1, -1, -5, -3, -1, 2, 9, 11, 2, 1, 2, -2, 8, 0, 5, 5, 2, -9, -1, -2, 14, -5, 3, 3, 9, 2, 2, 2, 5, -14, 2, 3, 3, 3, -7, -1, 5, -10, 1, -7, 6, -1, 1, -3, -4, 1, -7, 4, -5, 8, -9, 1, 3, -10, 3, 1, 9, -1, 1, -1, -4, -6, -9, 7, 1, 8, 40, -5, 2, -7, 5, -3, 1, -3, 4, 2, -1, 4, 0, 11, -4, 8, 8, 5, -3, -5, -3, -10, -3, 5, -1, 0, 0, 6, 12, 12, 0, 6, -2, -3, 0, 0, 2, 0, -7, 7, -3, 1, -12, 2, 1, -3, 9, -2, -1, 1, -4, 0, 5, -4, -9, 4, 7, 7, 4, 1, 1, -2, 4, -4, 0, 11, -13, 2, 6, 5, -3, 5, -3, 3, 0, 5, 1, -10, 3, 4, 6, 6, -4, 0, 3, 0, -6, -11, 11, 4, -6, 5, -6, -5, 2, -1, -11, 3, 0, -4, -5, 3, -9, -2, 7, -2, 3, 1, -11, 8, 1, 0, -4, 4, -2, -11, -1, -5, 4, 2, -2, 3, -11, -3, -39, -6, -6, 4, 5, 0, 4, 6, 11, -9, 1, 1, 1, -9, -4, 0, 0, 3, -1, -2, -4, 3, -1, 1, 4, -3, 20, 1, -5, -1, -1, -1, 2, -5, 1, -5, -6, 5, 0, 1, 1, -2, -7, -1, -9, 2, 2, 3, 7, -1, 2, -6, 2, 0, 1, -4, -13, 0, 0, 3, -4, 4, 5, 7, 2, -2, -2, -1, 0, -14, 2, 16, -1, 1, 4, 3, -9, -10, -1, 2, 9, -6, 1, 5, 5, 0, 5, 0, 4, -6, 6, -1, -2, -6, -3, -10, -33, 4, -4, 8, 0, 12, 9, 6, 5, 3, -1, -2, 8, 5, 6, -4, 4, 4, -1, -7, 6, -2, 17, 8, -5, 7, -2, 10, 5, -4, -7, 1, -7, -8, 0, -5, 3, 2, 0, -7, 12, -5, -5, -3, 17, -5, -8, -11, -2, -3, -8, -3, 2, -2, -7, 2, -2, -3, 6, -3, 1, 0, 0, 5, 1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/7/76/Blue_Linckia_Starfish.JPG", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Richard Ling <wikipedia@rling.com>", "explanation": ["Imagine stretching a super long piece of yarn to reach the Sun. How many times could it wrap around Earth?", "Your DNA, if stretched out, is like an incredibly long piece of yarn. If it wrapped around Earth once, it would still be much shorter than the distance to the Sun. Stretching it out to the Sun and back would mean it wraps around Earth over 600 times."], "example": "If the Earth's circumference is about 40,075 kilometers, and stretching DNA to the Sun and back is 93 million kilometers away, it's like wrapping it around Earth 600 times.", "whyItMatters": "Your DNA's length is so vast that stretching it to the Sun and back would wrap around Earth over 600 times."}, {"id": "84cab61eb168", "title": "Blood vessel", "slug": "blood-vessel", "headline": "Did you know there's a part of your body that breathes air directly?", "summary": "Corneas are the only body parts with no blood supply \u2014 they get oxygen directly from the air", "source": "Corneas are the only body parts with no blood supply \u2014 they get oxygen directly from the air", "sourceUrl": "https://en.wikipedia.org/wiki/Blood_vessel", "articleUrl": "https://en.wikipedia.org/wiki/Blood_vessel", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 6, 5, 4, 4, -3, 15, 2, -4, 2, 2, -8, -5, 0, 0, -8, 1, 1, -16, 2, -2, -5, 2, -6, 8, 2, 2, 4, 2, -9, -1, -1, 1, 1, 5, -3, -5, -5, -1, 0, 1, -2, -8, 3, 11, 7, 3, 0, 18, -4, 2, 4, 1, 9, -6, -4, -4, -4, 5, -8, -2, 5, -9, 2, 7, -2, 3, -8, 4, -8, 2, 5, 2, -2, -6, -3, 7, -5, 5, 3, -3, -1, 3, 2, 1, 0, -2, -11, -14, 5, -10, -8, -6, 7, 1, -5, 3, 1, -6, 48, -7, 9, 9, -4, -1, -6, -1, -2, 2, 6, 8, 4, 3, 0, 0, 0, 2, -6, 0, 4, 1, 5, 4, -1, 8, -4, 0, 15, 5, 3, 11, -5, -3, -7, -8, -3, 4, -2, -7, 4, 0, -10, -1, -4, -10, 1, 4, 7, -7, 3, -2, 10, -6, 3, -1, -5, -6, -2, 5, -5, 2, -3, -4, 6, 5, -1, -2, 3, 4, 2, 2, -3, 0, -13, 11, 11, -7, 4, 2, 4, 4, 5, 2, 2, 4, -3, -10, -4, 1, 12, 0, 5, -4, -6, 3, -6, 0, 0, -3, 1, 3, 1, -1, 6, 1, 1, 3, 0, 7, 1, -2, -1, -1, 1, -9, -6, -2, -13, 1, -2, 5, -15, -3, -37, 7, -1, -9, -1, 3, 4, 5, 1, 7, 11, -2, -6, 1, -3, 10, 1, -3, -8, 1, 9, 1, -4, -1, 4, 0, 22, 6, 7, -3, -2, 3, -4, -8, -3, -7, -5, -6, 3, 4, -11, 3, -10, 4, -7, -4, -7, 6, 1, -7, -1, -9, 4, -2, 3, 0, -2, -4, -10, 7, -1, -3, -2, -8, -4, 2, 2, 0, 10, -6, -3, 13, -3, 0, 2, 2, 9, -6, 3, -2, 9, -3, 1, 9, 3, 9, 5, -3, -6, -7, 2, 3, -3, -4, 8, -1, -24, 2, 3, 2, -4, -3, 0, -7, 2, 8, -1, 1, -3, -1, 5, 8, 12, -12, -3, 1, -1, 1, 12, -2, -10, 2, -4, 1, -3, 9, 13, 1, -3, 5, -1, 0, 0, 6, 5, -2, -2, -5, 4, 5, 5, -7, -7, 1, 4, -4, -5, 6, 13, 0, 2, -7, -5, -2, -1, 2, -4, 1, -2, 8, 1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Blood_vessels_%28retouched%29_-en.svg/1280px-Blood_vessels_%28retouched%29_-en.svg.png", "explanation": ["Imagine you're wearing a mask that filters out impurities from the air you breathe. Now, think about a part of your eye that doesn't have blood vessels to filter air like your mask.", "The cornea is like an air filter for your eye, getting oxygen straight from the air without needing blood vessels to transport it."], "example": "Just like your mask filters air for you, the cornea filters oxygen for your eye.", "whyItMatters": "The cornea breathes in oxygen directly from the air, unlike most tissues that need blood vessels to transport oxygen."}, {"id": "e22c8e1cc221", "title": "Skeletal muscle", "slug": "skeletal-muscle", "headline": "Did you know the jaw muscle is the strongest relative to size?", "summary": "The strongest muscle relative to its size is the masseter (jaw muscle)", "source": "The strongest muscle relative to its size is the masseter (jaw muscle)", "sourceUrl": "https://en.wikipedia.org/wiki/Skeletal_muscle", "articleUrl": "https://en.wikipedia.org/wiki/Skeletal_muscle", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [2, -14, -2, -8, -3, 0, 11, 4, -2, 3, -5, -17, -1, 1, 12, -5, 5, 6, -5, 4, 9, -1, 5, -5, 8, 2, -5, 0, -3, -19, 1, -9, 8, -7, -5, 10, 3, -6, 3, 1, 7, 15, -4, -3, 5, 3, 5, -6, 4, 6, 2, -4, 9, 8, 5, -2, 5, 0, 5, 1, -4, 10, -10, 1, 1, -1, 4, -2, 1, 3, 2, 2, 1, 5, -4, -9, -2, -1, 5, 2, -6, -10, -7, -7, -8, 0, 2, -1, -2, 5, -9, 5, 3, -5, 0, 1, -6, 3, -5, 39, -4, 6, 7, -1, 10, 1, -1, 7, 2, 9, 10, 9, -6, 7, -4, -6, 8, -3, 4, -3, -7, 5, 10, -3, -1, -7, -8, 8, 6, -7, 4, 2, -4, -2, 1, -4, 9, -7, 5, -4, -4, -9, 5, -3, -14, 9, -6, -3, 2, 0, 1, 0, -4, 6, -2, 3, 3, 1, 6, -12, -7, 1, -11, 1, 8, -15, -6, -4, 2, -8, 6, 0, -9, 4, 7, -3, -5, -13, 1, 10, 14, -6, -1, 0, 0, 3, -2, -2, 8, 0, 5, 8, -3, 2, -2, -5, 2, 11, -3, 3, 6, 2, -3, 4, 5, 6, 1, -2, 10, 1, -1, -7, 6, -3, -4, -13, 2, 3, -3, -3, 6, -6, -6, -30, -2, -5, 2, 10, -1, 14, -1, 5, -15, 4, 2, -7, -3, -6, 6, 7, -3, -10, -2, 10, 7, -17, 0, -1, 1, 14, 4, 6, 5, 0, 3, -4, -2, -2, 5, 4, -9, 7, 3, -6, -2, -2, -4, -2, -4, 2, -4, -1, -6, 3, 4, -2, 1, -5, -10, -9, 0, -5, 4, 2, -3, -2, -5, -3, 0, -2, 0, -3, 0, 2, 1, -5, -1, 4, -1, 5, 1, -2, -4, -4, 7, 2, 0, 4, 0, 5, 0, 2, -3, 8, -6, -7, -8, -6, 6, -29, 8, 1, 10, -12, -1, -2, -4, 3, 1, 6, 1, 1, 1, -7, -2, 5, 2, 9, -9, -2, -5, 12, 2, 2, 9, 4, -2, -3, -6, 5, -1, 6, -4, -5, 7, -3, 2, 2, -1, 2, 5, -1, -1, 18, -7, 0, -5, 2, 0, 0, -4, 1, 1, -7, -4, 7, -3, 5, 0, 7, 3, -7, 8, 2], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Blausen_0801_SkeletalMuscle.png/1280px-Blausen_0801_SkeletalMuscle.png", "explanation": ["Imagine biting into a tough piece of steak; your jaw muscles work hard to chew it.", "The masseter muscle, which makes your jaw move, is incredibly strong compared to its size, allowing you to chew tough foods like steak."], "example": "When you bite down on a steak, the masseter muscle (the strongest muscle relative to size) contracts powerfully.", "whyItMatters": "The masseter muscle is the strongest muscle relative to its size, enabling tough tasks like chewing."}, {"id": "5005e64d8a6b", "title": "Googol", "slug": "googol", "headline": "A googol is 10^100 \u2014 Google was named after it (misspelled)", "summary": "A googol is 10^100 \u2014 Google was named after it (misspelled)", "source": "A googol is 10^100 \u2014 Google was named after it (misspelled)", "sourceUrl": "https://en.wikipedia.org/wiki/Googol", "articleUrl": "https://en.wikipedia.org/wiki/Googol", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-2, -7, -2, -5, -3, -1, 3, 4, 2, 3, -3, 0, 1, 0, -3, 6, -6, -1, -9, 5, 24, -2, 3, -3, 7, 8, -3, -4, 0, -21, -5, -1, 3, 1, -3, 1, 4, 1, -10, 2, 5, 0, 4, 4, -1, 2, -8, -4, -5, -7, -3, 0, 6, 10, -3, 1, 9, 9, 9, -6, 9, 5, -16, 5, 0, -3, -1, -11, -5, 11, -1, 3, -1, 6, 3, -3, -4, 1, 0, 6, 5, -4, -5, -5, -5, -4, 5, 4, 2, -7, 5, -2, 2, 2, 2, 0, -3, -3, 2, 49, -7, 3, -3, -5, 2, -1, 1, -2, -5, -3, 0, 0, 10, 5, 0, -5, 0, 3, 6, -5, -2, -2, 6, -1, 1, 6, 2, 8, 0, 7, 4, -7, 6, -2, 3, 6, 3, 0, -5, 3, -8, -7, 0, 1, 2, 17, -7, -8, -3, -2, -3, -2, 1, -5, -5, 8, 10, 8, 1, -6, 3, -4, -1, 8, 7, -6, -3, -5, -4, -4, -1, -5, -6, 5, 2, -2, -4, 1, -1, 0, 11, -5, -3, 8, -9, 2, -5, -4, 4, 2, -5, 5, -3, 0, -3, 0, -4, -1, 4, -7, -1, 1, 0, -2, 1, 4, 8, -7, 1, 0, -4, -3, 1, 0, 1, -1, -9, 4, -5, -4, -1, -3, -16, -36, -3, -2, -5, 14, -3, -2, 2, 3, 7, -2, -7, 0, -2, -2, 8, 4, -2, 3, 3, 7, 6, -2, -6, -1, -1, 20, 10, -3, -11, 4, 1, -5, 1, 5, 0, 4, -2, -6, -3, -4, 0, -2, -3, 6, 3, -5, -11, -5, 13, -1, -2, 1, -2, 1, -1, -4, 2, -1, 6, 4, -6, -1, -2, -4, -6, -3, -4, 7, -3, 1, 11, 3, -7, 10, -1, 9, -2, -3, -5, -4, 3, 4, 6, 0, -1, 10, 1, -2, -7, -3, 7, 4, -2, -3, -4, -36, 7, 1, 5, 5, 2, 2, 1, 1, -4, 3, -4, -1, -6, -4, 0, 0, -1, 2, 5, 8, -2, 22, -2, 3, -1, 1, 12, 4, 4, -1, 1, 12, -7, 1, 3, -8, 0, 2, -3, 3, -4, -6, 8, 4, 0, 8, -3, -4, 2, 0, 1, 3, 5, -5, -5, 3, -4, -2, -3, -15, 2, 7, 4, 2], "explanation": ["A googol is a massive number, specifically 10^100, representing a 1 followed by 100 zeros. This immense quantity is used to illustrate the concept of extremely large numbers in mathematics. The term \"googol\" was coined by Milton Sirotta, the nine-year-old nephew of mathematician Edward Kasner, who introduced it in his 1938 book \"Mathematics and the Imagination.\""], "example": "If you write out a googol, it looks like this: 1 followed by 100 zeros, which is 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.", "whyItMatters": "Understanding a googol helps grasp the concept of extremely large numbers, which is fundamental in fields like computer science and mathematics.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Map_of_USA_with_state_and_territory_names_2.png/1280px-Map_of_USA_with_state_and_territory_names_2.png", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Wapcaplet"}, {"id": "a53ebdfe8be0", "title": "There are more possible chess games than atoms in the observable universe", "slug": "there-are-more-possible-chess-games-than-atoms-in-the-observable-universe", "headline": "How many chess games could there be compared to atoms in the universe?", "summary": "There are more possible chess games than atoms in the observable universe \u2014 about 10^120 vs 10^80", "source": "There are more possible chess games than atoms in the observable universe \u2014 about 10^120 vs 10^80", "sourceUrl": "https://en.wikipedia.org/wiki/Chess", "articleUrl": "https://en.wikipedia.org/wiki/Chess", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-8, -4, -5, -5, -8, 3, 3, 2, 6, 4, -4, -6, -1, -1, 4, -5, -9, -1, -12, 3, 3, -4, 3, -11, -6, 5, -2, -1, 3, -19, -2, -2, 7, 1, 0, -10, -2, -1, -11, -4, 4, 4, 10, 6, -1, 0, -5, 1, -6, -9, -1, 6, -1, 7, 9, -1, 0, 11, 8, 0, -3, -3, -5, 1, 9, -3, -1, -10, 2, 5, 3, 6, 0, 5, 1, -4, -5, -6, 2, -3, -2, -4, -3, -4, -6, -6, -7, 10, 2, -4, 1, 11, 3, 0, 1, 3, 7, 3, 1, 38, 5, -2, -1, -4, 0, 0, -1, -4, -11, 1, 2, -7, 8, 2, 0, 5, 13, 1, -1, 3, -4, 0, 0, -7, 1, -2, -12, 5, 0, 2, 2, -3, 2, -6, 0, -1, 2, 9, 9, 8, -4, -8, 7, -9, -7, 2, 1, -5, 2, -1, 6, 1, 2, -1, -1, -5, 6, 8, -14, -4, -4, 4, 6, 14, 2, 2, -4, -5, -2, -12, 2, 1, -5, 8, 11, -11, -6, -3, 5, 9, 2, 2, 2, 8, -1, -4, -1, 3, 2, -4, 3, 7, -1, 20, -4, -3, 4, -5, -3, -4, -4, -6, -11, 3, -3, -4, 7, -4, 5, 1, -10, -4, -8, 4, -5, -2, -5, 0, -2, -4, -1, -3, -4, -32, 2, -12, -7, 10, -6, -2, 3, 1, 6, -5, 2, 3, 2, 1, -5, -5, 0, -7, 3, 0, 3, -3, -2, 4, -8, 19, 2, 0, -3, 4, 3, -3, 5, 3, -3, -5, -1, 1, -3, -5, 6, 1, -2, 2, 8, 1, 3, 0, 7, 2, 6, -6, -2, 0, 3, -11, 0, 0, 8, 1, -1, -1, 4, 4, 2, 0, -2, 10, -9, 0, 6, 0, -1, 11, 1, 6, 5, -4, 9, 1, -6, -1, 6, 6, -4, 10, 0, 2, 1, 3, 9, -7, 6, -6, 0, -35, 9, 11, 11, -4, -8, 0, 0, -8, -14, 7, 0, -2, 0, 0, -4, 1, -6, 6, 3, 15, 8, 26, 4, 4, 5, 2, -1, -5, -4, -6, -4, 8, -6, 6, 13, -1, 5, 2, -10, -4, -6, -4, 2, 11, 6, 0, -7, -1, -2, -2, 0, 2, -7, 5, -3, 0, -6, 5, -3, -1, 4, 3, 4, 0], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/7/70/T_and_O_map_Guntherus_Ziner_1472.jpg", "imageLicense": "Public domain", "imageArtist": "Isidore of Seville", "explanation": ["Imagine you have a friend who loves chess. They say there's a game for every possible move they could make. But, when they look at the stars, they wonder how many stars there are compared to all those chess games.", "If you think about every possible move in a chess game, it's like counting every star in the universe. But, there are so many stars, it's like counting stars instead of chess games."], "example": "If you had 10 chess games for every star, you'd still have more chess games than stars.", "whyItMatters": "There are more possible chess games than atoms in the observable universe."}, {"id": "9183c1f2260b", "title": "Pi", "slug": "pi", "headline": "Pi has been calculated to over 100 trillion digits", "summary": "Pi has been calculated to over 100 trillion digits \u2014 but 39 digits is enough to measure the observable universe to the width of a hydrogen atom", "source": "Pi has been calculated to over 100 trillion digits \u2014 but 39 digits is enough to measure the observable universe to the width of a hydrogen atom", "sourceUrl": "https://en.wikipedia.org/wiki/Pi", "articleUrl": "https://en.wikipedia.org/wiki/Pi", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -5, -4, -8, -6, -2, -3, 6, 0, 6, 2, -14, 4, 0, -3, -6, -4, -1, -6, 1, 16, -4, -3, -3, 0, 15, 4, -11, 0, -22, -2, 1, 11, -3, 6, 0, 5, 3, 0, 4, 4, 10, 8, 2, -3, 0, -7, 7, -1, -3, -3, 5, 3, 7, 4, 2, 5, 5, 1, -6, 2, -1, -15, 1, 8, -2, -6, -14, 7, 3, -2, -3, -5, 3, 1, 0, -5, -3, 0, -3, 1, 0, -5, 3, -5, -3, 0, 10, -3, -4, -3, 3, -2, -1, 2, 3, 6, 0, -1, 42, 2, 1, -6, -4, 4, 3, 1, 0, -7, 0, 2, 0, 3, -10, 13, 1, 2, 4, 4, -1, -1, 2, 1, -1, 4, 5, 0, 7, -3, 10, 3, -5, -3, -5, 5, 4, 6, 6, 7, 6, -3, -3, 1, -4, -2, 14, -5, 5, 2, -7, 5, 11, -4, -10, 0, -1, 1, 6, -3, 5, 0, 3, 1, 8, 2, 0, 1, 0, 0, -11, -1, -4, -6, 5, 11, -7, -6, 5, -3, 5, -3, -1, -4, 1, -5, -3, -4, 4, 2, -6, 4, 12, -5, 11, 1, -7, -2, 2, -9, 0, -5, -6, -9, -2, -3, -1, 12, 2, 2, 4, -3, -4, -3, -4, -12, 0, 2, -1, -1, -2, 3, -10, -11, -36, -6, 0, -3, 14, -5, 2, -1, 3, 3, -4, 0, -3, -7, -6, 0, -1, 0, -7, 3, 0, 8, -14, -1, 0, -1, 13, 4, -11, -2, 4, -4, -3, -4, 4, -3, -8, 10, -2, 2, -4, 2, -1, -2, 3, 4, -3, 2, 2, 0, 1, -3, -2, -8, -9, -3, -8, -3, -3, 4, -4, 0, 0, 5, 2, -4, 1, 5, 2, -6, 11, 16, -3, 3, 14, -2, 11, 3, 2, 6, 6, 0, 2, 2, 2, -2, 10, -1, -6, -3, 0, 0, -2, -1, -5, 1, -37, 4, -6, 9, -1, -2, 1, 8, -8, -3, 0, 6, 6, -3, 0, -6, -3, -4, -1, -4, 14, 4, 24, 0, 0, 1, 5, 3, 8, -2, -12, 1, -1, -7, -2, 4, -1, 1, 3, -3, 5, -5, -1, 0, 16, -2, -3, -7, 4, -5, 1, 2, 0, 0, -3, 7, -2, 1, 5, -4, -6, 3, 4, 5, 2], "explanation": ["Pi's decimal digits are believed to be evenly distributed, although this has not been proven. This property makes Pi a fascinating subject for mathematicians and scientists alike."], "example": "The decimal representation of Pi starts as 3.14159...", "whyItMatters": "Understanding Pi's properties and its extensive computational achievements helps appreciate its significance in mathematics and science.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/6/6a/Telefono_di_Meucci_-_Museo_scienza_tecnologia_Milano_02148-02147_dia.jpg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "Meucci Antonio (inventore), Officine Galileo (costruttore)"}, {"id": "d96f612157e7", "title": "Zero was invented independently in Mesopotamia, India, and by the Maya", "slug": "zero-was-invented-independently-in-mesopotamia-india-and-by-the-maya", "headline": "Did you know zero has a secret twin?", "summary": "Zero was invented independently in Mesopotamia, India, and by the Maya \u2014 India's version spread globally", "source": "Zero was invented independently in Mesopotamia, India, and by the Maya \u2014 India's version spread globally", "sourceUrl": "https://en.wikipedia.org/wiki/Signed_zero", "articleUrl": "https://en.wikipedia.org/wiki/Signed_zero", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 2, 2, 1, -5, -2, 6, 5, -8, 0, 9, -5, -2, 0, 2, -1, -7, -9, -2, -4, 12, -10, 12, -6, 8, 8, 3, 0, 3, -20, 5, 1, -2, -1, -8, 3, 1, 2, -10, -8, -2, 1, 10, -6, -1, 6, 0, 8, 3, -3, 4, 2, -1, 2, 2, 1, 2, 4, -1, 5, 5, 1, -16, 2, 8, 1, -6, -9, -3, 0, 8, 4, -2, 0, -7, 4, 7, 2, -4, -2, 9, -6, 3, -1, -6, 2, -1, -1, 1, -1, -7, 9, 3, -4, -2, 3, -4, 2, 1, 35, 1, -13, 8, 5, 0, 5, -4, -4, 2, 1, 5, -1, 4, -7, 1, -6, 4, -5, 3, 0, -4, -1, -1, -6, -2, -3, -1, 7, -13, -5, 6, -3, -2, -3, -2, 2, -2, 0, 4, -12, -3, 4, -2, -3, -1, -1, 7, -2, 4, 0, 1, -1, -5, -6, 12, -2, 7, 5, 4, 2, 0, 1, -2, 15, 6, -21, 6, 7, 0, -1, 1, -1, -4, 8, 7, 3, -3, -3, 1, 5, -5, -7, 7, 5, 4, -9, -1, 7, -6, 1, 3, 8, -6, 7, 10, -3, 2, 0, 6, -7, -1, -3, -2, 0, -3, 4, 8, -1, -1, 12, 8, -3, -2, -4, -1, -3, -6, -4, -1, 0, -1, -18, -6, -35, -5, -5, 1, 5, 4, 3, -6, 7, 2, 10, 0, -5, 18, 1, 0, 5, 2, 2, -4, 1, 6, 5, -6, 0, -4, 20, 4, 6, 2, -3, 4, 8, -4, -5, -1, 3, -5, -1, 0, -5, 0, 4, -7, 3, 4, -12, -2, 3, 0, 1, 0, -7, 3, -9, -9, -4, 3, 4, 7, -4, -1, -2, 4, -4, 8, -4, 1, 10, -2, 2, 18, -5, -6, -2, -7, 14, -7, -5, 4, -3, 7, -3, 7, -8, 11, 10, 2, 2, -3, 6, 2, 8, -4, -1, -7, -32, -1, -10, -1, -3, -1, 2, 6, 4, 1, 4, -13, 5, 5, 4, 0, 1, -7, -1, -4, 5, 15, 19, 3, 0, 2, -2, 5, -6, 3, 2, 4, -1, -4, -8, 4, 0, 1, -1, 4, -13, 0, -3, -4, 11, -1, -6, -2, -2, -4, 3, -1, 2, -3, 6, -4, -3, -10, -11, 0, -4, -3, -3, -4, -8], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Tibiao%2C_Antique_%28P._Martin%29_-_Flickr.jpg/1280px-Tibiao%2C_Antique_%28P._Martin%29_-_Flickr.jpg", "imageLicense": "CC BY 2.0", "imageArtist": "Peter Martin", "explanation": ["Imagine you're dividing by a number that should be zero but isn't. What happens to your result?", "In math, dividing by zero is a no-go. But computers have a workaround with negative and positive zero, treating them as different but equal."], "example": "Dividing 5 by 0 in a computer gives you infinity, while dividing 5 by negative zero gives you negative infinity.", "whyItMatters": "Negative zero and positive zero are like mirror images of zero in the world of computers."}, {"id": "4985c8bbde65", "title": "1729 (number)", "slug": "1729-number", "headline": "1729 is the smallest number expressible as the sum of two cubes in two ways", "summary": "The number 1729 is the Hardy-Ramanujan number \u2014 the smallest expressible as the sum of two cubes in two ways", "source": "The number 1729 is the Hardy-Ramanujan number \u2014 the smallest expressible as the sum of two cubes in two ways", "sourceUrl": "https://en.wikipedia.org/wiki/1729_(number)", "articleUrl": "https://en.wikipedia.org/wiki/1729_(number)", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -2, -9, -8, -6, 8, 1, 2, 0, -3, 1, -11, 7, -3, 5, 1, -3, 3, -7, -3, 20, 0, -5, -4, 6, 5, 3, -3, 2, -21, 3, 9, 6, -5, -3, -6, 0, 1, -7, -3, -1, 4, 5, 0, 2, -3, 2, -2, -2, -6, -4, 2, 3, 7, 0, -5, 2, 8, -1, 7, 4, -5, -17, 4, 2, -1, -3, -11, -7, 13, 3, 4, -1, 4, 2, 0, -5, -3, 2, 1, -3, -8, 0, 6, -1, -9, 1, -2, 0, -1, -3, 5, 0, -7, -8, -3, 0, 1, 3, 43, 0, 4, 0, -5, -2, -5, -2, -12, -4, -9, -3, -7, 12, -2, -7, 2, 2, 8, 4, -1, -2, -3, 1, -5, 6, 5, 1, 10, 0, 3, 0, 4, 4, -2, 7, -1, 0, 7, 2, -7, -1, -1, -3, -1, -4, 10, -4, -6, 5, 1, 3, -1, -5, -4, 2, 4, 8, 1, -3, 2, 4, -9, -2, 4, 0, -3, 6, -4, 1, -6, 4, 6, -1, 5, 3, 2, 1, -6, 1, 9, -2, 0, 0, 3, -2, 5, 0, 3, 5, 3, -5, 4, -4, 13, -5, 1, -1, 1, -5, 2, 8, 0, 4, 1, 7, -7, 9, -2, -9, 5, -5, 4, -1, -4, 3, 11, 2, -1, 0, -6, -2, -11, -4, -37, -5, 4, -7, 2, -2, 5, -8, -5, 6, 2, -1, -8, 2, -5, -2, -2, 0, 0, 1, 1, 2, 8, 2, -4, 4, 17, -2, 3, -4, 2, 1, -5, 7, 8, -4, -3, -2, -2, 1, -1, -2, 8, -4, -1, -1, -4, -13, 3, -5, -4, 1, 6, -3, 10, 2, -3, -10, -9, 4, -8, -10, 8, -3, -7, 4, -2, -2, 6, -4, 1, 1, 1, -9, 0, 1, 2, 2, 3, -2, -2, -2, 10, -4, 2, 1, -1, 8, 2, -3, -2, 6, 12, -5, 1, -3, -37, 0, -6, -1, -4, 0, 6, 0, -7, -6, 8, -4, 7, 2, 6, -3, 4, -10, 3, 2, 13, 4, 28, 3, 7, -5, 7, 8, -2, 7, -2, 0, 16, -10, -1, 1, -5, 3, 1, 1, 3, -6, -13, 7, 5, 5, -8, -3, 0, -4, 4, 0, 6, -5, 4, 1, -5, -3, -2, -1, -2, -1, 8, 10, 1], "explanation": ["1729 is a unique number in mathematics known as the Hardy-Ramanujan number. It is the first nontrivial taxicab number, meaning it can be expressed as the sum of two cubic positive integers in two different ways. This property makes it a fascinating subject of study in number theory."], "example": "1729 can be expressed as 1^3 + 12^3 or 9^3 + 10^3.", "whyItMatters": "Understanding the properties of numbers like 1729 helps mathematicians explore deeper concepts in number theory and its applications.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/LNER_Class_A1_4-6-2_No60163_%27Tornado%27_%2829903372180%29.jpg/1280px-LNER_Class_A1_4-6-2_No60163_%27Tornado%27_%2829903372180%29.jpg", "imageLicense": "CC BY-SA 2.0", "imageArtist": "Alan Wilson from Stilton, Peterborough, Cambs, UK"}, {"id": "d85b8acb1436", "title": "The Fibonacci sequence appears in sunflower seed patterns, pinecones, and galaxy spirals", "slug": "the-fibonacci-sequence-appears-in-sunflower-seed-patterns-pinecones-and-galaxy-s", "headline": "Did you know math patterns can grow like plants?", "summary": "The Fibonacci sequence appears in sunflower seed patterns, pinecones, and galaxy spirals", "source": "The Fibonacci sequence appears in sunflower seed patterns, pinecones, and galaxy spirals", "sourceUrl": "https://en.wikipedia.org/wiki/Fibonacci_sequence", "articleUrl": "https://en.wikipedia.org/wiki/Fibonacci_sequence", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-7, -5, -4, -2, -2, 6, -6, 1, 6, 3, 5, -3, 4, 0, 0, -5, -6, 2, -7, -2, 11, -4, -6, -10, 2, 10, -3, -6, -4, -28, 0, 12, 9, -5, 0, -1, -4, 6, -6, 3, 2, -1, 7, 4, -3, -10, -4, 0, -1, -6, -8, -5, -2, 8, 0, 6, 10, -2, 0, 2, 4, 4, -15, 12, 7, -1, 4, -8, 3, 1, 4, 0, -1, 5, 11, 1, -6, -4, -1, 6, -7, 0, -8, 0, -2, 1, -1, -4, 1, 4, -2, 1, -3, -1, -7, 0, -2, 0, 5, 47, 1, 3, 7, 0, 2, -5, -4, -10, 0, -4, 3, -4, 10, -2, -3, -3, 4, -1, 1, 9, -7, 11, -2, -8, 5, -4, -13, 8, 1, -2, 3, 12, 3, 4, -6, 1, 0, 0, -4, -2, 0, 0, 5, -2, -6, 0, 3, 4, 3, 2, -1, 0, 5, -9, 5, 8, 6, 4, -1, 7, -4, 4, -4, 15, 2, -12, 9, 1, 1, -5, 3, 4, 0, 2, 7, 0, -5, -3, 4, 3, -3, -5, 0, 2, -2, -3, -2, 1, -3, -4, 1, -2, -2, 7, -12, -8, 3, 4, -3, -7, 0, -4, -4, 4, -2, -5, 8, 0, -1, 4, -5, 0, -4, 1, -11, 4, -3, 5, 6, 1, -1, -9, -5, -41, -7, 1, -8, 7, -1, 2, -4, 3, -1, -8, 2, 3, -9, -5, 1, 3, -8, -5, -2, -3, -1, -6, -3, 1, -2, 17, 6, 7, 1, -5, -3, -4, 4, 7, 1, 6, 1, 2, -5, -6, 2, -6, -2, -7, -1, -4, 2, 3, 2, 1, 2, 5, -1, 1, -4, -6, 0, -5, 5, 2, -1, 5, 4, 4, 8, -2, -1, 2, -5, 0, 9, -5, -1, 4, 0, 8, -2, -1, -4, 9, -7, 2, 6, -2, 0, 0, -3, 7, -2, 3, 3, -4, 3, 9, 4, -35, 6, -1, 8, -1, 1, 11, 0, -3, 2, -4, 4, 6, -5, 0, -1, 4, -4, 5, -3, 4, 7, 31, 1, -5, -5, 5, -2, -1, 0, 0, 0, 6, -4, 1, 6, 1, 2, 4, -2, 1, 2, -11, -2, 4, -3, 3, 0, 7, 3, -2, -5, 2, -2, -7, 6, -6, 1, 2, 4, -3, -5, 0, 4, -3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Chaucer_Astrolabe_BM_1909.6-17.1.jpg/1280px-Chaucer_Astrolabe_BM_1909.6-17.1.jpg", "imageLicense": "Public domain", "imageArtist": "Marie-Lan Nguyen", "explanation": ["Imagine you're planting seeds in a sunflower, hoping for a beautiful pattern; how do you know where to plant the next seed?", "The seeds naturally spread out in a spiral pattern, which follows a mathematical sequence called the Fibonacci sequence. This sequence helps predict the next position for planting seeds."], "example": "If you plant 1 seed, then 1 more, then 2, then 3, and so on, following the Fibonacci sequence, you'll see the seeds forming a spiral pattern.", "whyItMatters": "The Fibonacci sequence guides the natural growth pattern of sunflower seeds, creating the beautiful spiral."}, {"id": "48fd14e7b714", "title": "Perfect number", "slug": "perfect-number", "headline": "A perfect number equals the sum of its proper divisors", "summary": "A prime number cannot be divided evenly by any number except 1 and itself \u2014 the largest known has 24 million digits", "source": "A prime number cannot be divided evenly by any number except 1 and itself \u2014 the largest known has 24 million digits", "sourceUrl": "https://en.wikipedia.org/wiki/Perfect_number", "articleUrl": "https://en.wikipedia.org/wiki/Perfect_number", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -6, -4, -8, -7, 3, 1, 0, 1, 2, 1, -8, 4, 0, 0, 0, -7, 0, -4, 5, 24, -7, -5, -5, -1, 1, 0, -7, -3, -26, -6, 0, 0, -3, 4, -1, -3, 3, -5, 1, 1, 8, 2, 4, 0, -2, -7, 6, 13, -5, -2, 0, 0, 12, -3, 0, 6, 3, 5, -1, 1, -1, -11, 2, 5, 0, 1, -12, -3, 4, 9, 11, 0, 5, -1, 2, -5, 1, 6, 6, -2, -8, 2, -7, -1, -6, 6, 5, -3, -7, -4, 6, 6, -1, 1, 3, -3, -4, -2, 35, 5, 5, -8, -13, 1, 4, 6, -6, 1, -9, 4, -10, 13, -8, 2, -8, 5, -2, 2, -4, 0, 4, -1, 0, 3, 9, -6, 9, 0, 10, 1, -4, 3, -7, -4, -1, 2, 6, 13, -9, -1, -7, 3, 4, -2, 2, -4, 1, 7, 2, 2, 0, -10, -11, 10, 0, 12, 5, -4, -4, 4, 6, -3, 17, 7, -1, -2, 1, 0, -6, 4, 0, -5, 12, 8, -8, 1, 1, 5, 3, -6, 1, 9, 2, 5, 1, 3, 0, 4, 0, 1, 17, -11, -3, -9, -4, -3, 7, -5, -6, -6, -2, 2, -2, -2, 3, 5, -6, 2, 5, 0, -4, -5, -4, 2, 1, 4, 2, 7, -3, 0, -8, -5, -37, -5, 2, -10, 5, 4, 5, -5, -5, 7, 0, -4, -7, 2, -9, 1, -9, 2, 0, 8, -1, 10, -4, 0, -3, 1, 15, -6, -3, -1, 5, 9, -5, 1, 3, -10, -9, 0, 1, 3, -1, -2, -2, 0, -3, 3, -12, -2, 6, 9, -1, -4, 4, -1, 5, -3, -9, -1, -9, 6, -1, -7, 6, -2, -1, 7, -4, 6, 3, -2, 9, 12, 0, -7, 4, 3, 11, 0, 4, -5, 7, 1, 7, -3, 2, -6, 2, 11, -5, -5, 0, 7, 1, 0, 2, -2, -28, 11, -6, -1, -7, 1, -6, 6, -8, 1, 3, -2, 2, -1, -5, 0, -6, 0, 2, 1, 12, 5, 17, -1, 1, -1, 5, 7, -5, 0, -3, -9, 9, -7, -1, 3, 2, -4, 3, 1, -9, 1, -6, 0, 18, -3, -6, 5, 0, -3, -4, -3, 7, 3, 1, -5, -5, 2, -6, -4, -3, 2, 0, 7, -6], "explanation": ["A perfect number is defined as a positive integer equal to the sum of its proper divisors. These divisors exclude the number itself. For instance, 6 is a perfect number because its divisors 1, 2, and 3 sum up to 6."], "example": "The number 28 is a perfect number because its divisors 1, 2, 4, 7, and 14 sum up to 28.", "whyItMatters": "Understanding perfect numbers helps in studying number theory and the properties of integers.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/db/Perfect_number_Cuisenaire_rods_6_exact.svg/1280px-Perfect_number_Cuisenaire_rods_6_exact.svg.png"}, {"id": "edbd09bd54c1", "title": "Birthday problem", "slug": "birthday-problem", "headline": "Only 23 people needed for a 50% chance of shared birthday", "summary": "The birthday paradox: in a group of 23 people, there's a 50% chance two share a birthday", "source": "The birthday paradox: in a group of 23 people, there's a 50% chance two share a birthday", "sourceUrl": "https://en.wikipedia.org/wiki/Birthday_problem", "articleUrl": "https://en.wikipedia.org/wiki/Birthday_problem", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-6, -5, -6, 0, -7, -4, 4, 1, 4, 2, 6, 2, 1, 5, -1, 11, -8, -5, -13, 1, 1, -5, 0, -3, -1, 10, -2, -10, -3, -17, -3, -3, 4, -5, -4, -5, 1, 5, -1, 3, -1, 0, -3, -1, -2, 0, -12, 7, -3, 3, 3, -4, 1, 8, -4, 7, -5, 9, 2, 1, 2, -1, -10, 5, 2, -2, -4, -3, -9, 0, 0, 9, 6, 10, 5, -2, 5, -8, 1, 0, -8, 2, -1, -2, 1, -3, 4, -1, -8, 1, 2, 5, -4, -1, -1, 3, 8, 2, -4, 50, 1, 5, 3, 6, -2, -1, -5, -9, -1, -1, -6, -3, 8, -6, -1, 1, 7, 0, 5, -4, 1, 1, 6, -5, -4, 6, 0, 15, 2, -1, 4, 1, -4, -2, -7, -9, -5, 2, 2, -10, 9, -7, 7, -1, -5, 15, 0, 3, 1, 0, -2, 1, -1, -4, 4, -3, 7, 5, -1, 7, 9, -6, -4, 12, 0, -11, 3, 4, 2, -4, 4, 3, 1, 11, 10, 4, -5, 4, 3, 3, 2, -1, -7, 6, -4, -5, 3, -6, 4, -1, 4, 1, -14, 6, 4, 0, -3, -6, -1, -5, -7, -6, -3, 4, -1, 5, 5, -7, 6, -4, 5, -7, 1, 3, 0, 10, 4, 2, 5, 2, 1, 0, 2, -35, -2, 1, -7, 0, 5, -1, 3, -4, 9, 9, -5, -7, 4, -2, -3, -13, 4, 0, 2, -1, 5, -1, -7, 5, 0, 16, 3, -5, -3, 4, 5, -4, 0, 7, 1, -5, -10, -5, -2, -2, 4, 3, -9, -3, -3, 0, 0, 4, 3, 5, -2, 2, 1, 2, -2, -10, 2, -3, 8, -5, -2, 1, -2, 0, -4, -12, 2, -1, 3, 2, 8, -8, -4, 1, -4, 0, -1, 7, 4, 9, -10, -5, 8, 2, -2, -5, 7, -1, -4, -2, 1, -1, 9, -4, 0, -35, 2, -4, 8, 8, 2, 6, 3, -5, -4, 8, -1, 8, 0, 2, 2, -4, -6, -3, -2, 7, 8, 23, -3, -2, 0, 2, 5, 5, -3, -14, -4, 6, -9, 1, -1, -3, -5, 4, -6, -5, -3, -2, -3, 20, 0, 1, -4, 11, -1, -1, 2, -10, -4, -1, 0, 0, -1, 5, 3, -3, 5, 11, 3, -4], "explanation": ["The birthday paradox reveals a surprising probability result in probability theory. It shows that in a group of 23 people, there's a 50% chance that at least two individuals share the same birthday. This counterintuitive fact challenges our initial assumptions about probability and randomness.", "The paradox arises because we compare every possible pair of individuals in the group. With 23 people, there are 253 unique pairs to consider. As the number of pairs increases, the probability of at least one shared birthday also increases, eventually surpassing 50% at 23 people.", "Real-world applications of the birthday paradox include cryptographic attacks like the birthday attack, which leverages this probabilistic model to find collisions in hash functions more efficiently. Understanding this paradox helps us grasp the underlying principles of probability and randomness in various fields."], "example": "In a classroom of 23 students, there's a 50% chance that at least two students share the same birthday.", "whyItMatters": "Recognizing the birthday paradox helps us understand surprising probability outcomes and their applications in fields like cryptography.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Birthday_Paradox.svg/1280px-Birthday_Paradox.svg.png"}, {"id": "61ad8e1a72b2", "title": "Benford's law", "slug": "benford-s-law", "headline": "The leading digit '1' appears about 30% of the time in datasets following Benford's law", "summary": "Benford's law: in natural datasets, the leading digit is 1 about 30% of the time, not 11%", "source": "Benford's law: in natural datasets, the leading digit is 1 about 30% of the time, not 11%", "sourceUrl": "https://en.wikipedia.org/wiki/Benford%27s_law", "articleUrl": "https://en.wikipedia.org/wiki/Benford%27s_law", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, -6, 0, -8, -3, -1, 7, -5, 1, -6, 1, -2, 2, -2, -7, 1, -2, -5, -3, 6, 9, 3, 2, -8, 4, 1, -2, -6, -3, -31, -2, -4, 7, -4, -1, -3, 3, 3, -1, -5, 1, -3, 6, 2, -12, 6, -1, 2, -2, 2, -4, -3, -1, 10, 2, 5, 10, 6, 0, -4, 4, 0, -17, 2, 8, -2, 3, -9, -11, 3, 1, -1, -5, -1, 0, 4, -4, -7, 4, 5, -4, 2, -2, -5, -1, 0, 3, -10, 3, 1, 0, 6, -5, 5, -4, 3, 3, 5, 2, 46, -5, 3, -6, -1, 5, -6, 12, -12, 1, 0, 6, -2, 3, -10, 4, -6, 6, 0, 4, 2, -1, -3, 7, -4, 1, 8, 6, 14, -3, 6, 3, -7, -15, -5, -3, -1, 3, 7, -3, -1, -2, -3, 8, 6, -1, 18, 0, -1, 0, -6, -3, 6, -6, -8, -5, 0, 1, -1, 3, -7, -3, 3, -3, 9, 6, -10, 5, 5, -2, 0, 5, -7, 3, 5, 10, -10, -7, -4, -2, 5, 2, -5, 2, 5, 6, 2, -9, 1, 5, 5, 8, 6, -1, 3, -8, -3, -1, -2, -1, -2, -5, -1, -1, -3, 3, 5, 1, -3, 8, 7, 0, -5, 0, -6, 1, -1, 1, -1, 2, 4, -2, -2, -6, -41, -2, -2, -4, 6, 6, 4, 3, 2, 9, -2, -1, -10, -7, 1, 2, 4, -3, -3, 3, -1, 3, -9, -8, 1, 3, 12, -11, 3, 2, 2, -5, -4, 1, 7, -4, -2, -2, -4, -2, -2, 1, 0, -2, 1, -8, -3, 3, -4, 4, -1, -3, 3, 8, 1, -5, -10, 5, 1, 6, -5, -6, 2, -3, -1, 1, -1, -2, 0, 2, 4, 14, -4, -6, 4, 2, 6, -1, -1, 8, 2, -2, 5, 4, 3, -3, 7, 8, -2, -2, 4, -5, 0, -1, 2, -1, -35, 6, -7, 6, 4, -1, 0, -2, -5, -1, -12, 8, 10, 1, -4, 0, -1, -5, 6, -1, 9, 4, 21, 0, 5, 2, -2, 3, 5, -5, 2, 4, 12, -4, 4, 12, -2, -4, -2, -7, 1, -1, -9, 8, 10, -5, 3, -5, 7, 0, -4, -1, 2, -2, 3, 6, 3, 4, -4, -5, 0, -5, 2, 7, -1], "explanation": ["Benford's law predicts the frequency of leading digits in many real-life numerical datasets. The law states that the number 1 appears as the leading significant digit about 30% of the time, while 9 appears less than 5% of the time. This observation is based on the assumption that the dataset values are uniformly distributed on a logarithmic scale."], "example": "In a dataset of financial transactions, if we apply Benford's law, we would expect to see the digit '1' as the leading digit in approximately 30% of the transactions, while '9' would appear as the leading digit in less than 5% of the transactions.", "whyItMatters": "Understanding Benford's law helps in identifying anomalies and potential fraud in datasets, as real-world data often follow this pattern.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Rozklad_benforda.svg/1280px-Rozklad_benforda.svg.png"}, {"id": "101d01e7a8fa", "title": "Monty Hall problem", "slug": "monty-hall-problem", "headline": "Switching wins 2/3 of the time", "summary": "The Monty Hall problem: you should always switch doors \u2014 switching wins 2/3 of the time", "source": "The Monty Hall problem: you should always switch doors \u2014 switching wins 2/3 of the time", "sourceUrl": "https://en.wikipedia.org/wiki/Monty_Hall_problem", "articleUrl": "https://en.wikipedia.org/wiki/Monty_Hall_problem", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -1, 3, 1, -6, 9, 9, -2, 11, -1, -1, 2, 2, 2, 0, 2, -7, 4, 0, 3, -2, -1, 2, -1, -1, 2, 2, -3, -9, -25, -3, -8, 4, -1, 0, -1, -4, 6, 1, -1, 0, 8, 4, -2, -3, -1, 0, 1, -1, 3, -9, -1, 2, 0, 6, 12, 8, 11, 0, 2, 3, 3, -16, 6, 9, 3, -5, 3, -10, 11, -9, -3, -3, -1, 8, 0, -11, 0, 1, 1, 2, -3, -3, -3, -3, -3, 0, -2, 1, -1, 1, 8, 5, -1, -2, 1, 2, 7, -2, 51, -1, 3, -8, 0, 3, -2, -2, -4, -3, 4, 4, -1, 11, -6, -2, 11, 9, 1, 4, 1, -6, 5, 2, 0, 0, -6, 2, 13, 0, -4, 5, 1, -3, 5, -4, -1, 1, -1, 6, -1, 3, -3, 8, -8, 0, 12, -4, -2, 4, -4, 0, -2, -4, -10, -7, -2, 1, 2, 0, -7, -6, -1, -6, 10, 1, -6, -2, -4, -15, -7, -1, -1, -6, 2, 7, -3, -11, -8, 4, -1, 9, -3, -9, 0, 1, 0, 0, -5, 3, 7, -1, -1, -3, 6, -7, -3, -1, -6, 5, 0, -9, -4, -2, -1, -3, 5, 4, -7, 16, -4, -6, -5, -3, -3, 3, -3, 3, 6, 4, 5, -5, 8, 1, -40, -5, -7, 3, 2, -4, -2, -3, 2, 3, 6, -2, -10, 2, 2, 2, -6, 4, -7, 4, 1, 5, -1, -10, -1, 1, 19, 1, 6, 1, 6, 0, -3, 0, 8, 6, 6, -7, -4, -6, 0, 3, -2, -5, -8, -3, -3, -2, -2, 2, 6, -1, 6, -2, 3, -6, -4, -1, 2, 5, -3, 3, 1, -6, 1, 0, -3, -4, -2, 3, -2, 5, 1, -6, -2, 5, -2, 1, 0, -4, 2, -9, 3, 3, 2, -2, -2, 5, 13, 1, 0, 6, -4, -2, 3, 2, -35, -1, 7, 1, 0, 10, 1, -3, -7, 0, 0, 7, 1, 5, 0, -3, 6, -1, 5, 2, 3, 10, 27, -7, 9, -1, 3, 2, 0, 1, -5, -2, 13, -1, 4, 0, -5, -5, -5, -7, -4, 5, -3, 1, 12, 0, 3, -4, 1, 1, -9, -3, -3, -1, -6, 1, 3, 0, 2, -6, -3, 3, 6, 3, 3], "explanation": ["When you initially choose a door, there's a 2/3 chance the car is behind one of the other two doors. Monty Hall, knowing what's behind the doors, always opens a door with a goat, which doesn't change the initial probabilities. Therefore, switching to the other unopened door increases your chances of winning the car."], "example": "Suppose you choose door No. 1 and Monty opens door No. 3 revealing a goat. Initially, you had a 1/3 chance of picking the car and a 2/3 chance it was behind one of the other two doors. By switching to door No. 2, you now have a 2/3 chance of winning the car.", "whyItMatters": "Understanding this strategy can significantly increase your chances of winning the car in the Monty Hall problem.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Monty_open_door.svg/1280px-Monty_open_door.svg.png"}, {"id": "662dd56b6450", "title": "Octopuses have three hearts, blue blood, and nine brains", "slug": "octopuses-have-three-hearts-blue-blood-and-nine-brains", "headline": "Did you know an octopus has three hearts?", "summary": "Octopuses have three hearts, blue blood, and nine brains \u2014 one central, eight in their arms", "source": "Octopuses have three hearts, blue blood, and nine brains \u2014 one central, eight in their arms", "sourceUrl": "https://en.wikipedia.org/wiki/Octopus", "articleUrl": "https://en.wikipedia.org/wiki/Octopus", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-6, -2, -2, -3, -4, 0, 10, -4, -2, 3, -1, -11, -1, -6, -1, -3, -1, -3, -11, 3, 7, -4, -6, 3, -6, 3, 6, -2, -3, -15, -7, 1, 8, -2, 2, 3, -1, 2, 0, 5, 5, 1, 1, 4, 3, -1, -1, -2, 7, -5, -1, -3, -6, 8, 2, -1, 8, 3, 4, -2, 3, 10, -5, 7, 6, -5, -12, -1, -4, 2, 1, -4, 16, -6, -8, -1, 2, -1, 0, -1, -8, -3, 0, -2, 4, -9, 7, -9, -12, 3, -10, -7, -4, 1, -2, 0, -4, -4, -5, 45, 3, -2, 9, -2, 8, 1, 5, -3, -3, 7, -3, -4, 2, -5, 5, 3, -1, -10, 2, -2, -1, -5, 8, -1, 8, -3, -3, 14, 8, -2, 4, 9, -4, -2, 1, 4, 5, -4, -1, -5, 1, -8, 7, -8, -5, 7, 9, 2, -10, 9, -9, 10, -3, 0, -2, 2, 1, 12, 1, 1, 1, 6, -6, 5, 4, -9, -3, -1, 0, -4, -4, 7, -2, 1, 3, -6, 4, 3, 10, 4, -4, 0, -9, 7, -6, 0, 0, -2, -3, 4, 12, 5, 0, 11, -7, -3, 4, -2, -2, 4, 6, -9, -7, 5, 6, -1, 5, 0, -1, -1, 6, 4, 9, -1, -4, -1, -1, -1, 7, -8, 1, -13, -3, -32, -3, -8, -10, 4, -1, 6, 1, 7, 0, -5, -5, -4, -1, 0, 9, 7, -3, -1, 15, -2, 3, -3, 7, 0, -2, 23, 11, 0, -1, 3, 7, -3, -7, 4, 4, 0, -9, 1, 0, -10, 2, -2, -1, -7, -11, -2, 1, 5, 0, -3, -1, -2, 2, 2, -2, -11, -5, -6, 12, 4, -3, -1, -3, 3, 5, -1, -2, 4, -11, 4, 8, 6, -7, 7, 2, 4, -6, 10, 4, 4, -6, -1, 3, 5, 4, -4, 3, 1, -4, 5, 1, -4, -5, -2, 3, -29, 9, 7, 8, 3, -3, -4, -11, 9, 1, -1, 3, 1, 1, -9, 4, 2, -2, 5, -2, -9, 0, 15, 1, -7, 0, 1, 11, -10, 3, 7, -7, -2, -10, 5, 8, -6, -2, 5, 1, -2, 0, -7, -8, 10, 6, -4, 5, 4, 0, -12, -4, 6, -5, 6, -1, -3, -8, -5, -7, 2, -4, 2, 16, 11], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Underwater_World.jpg/1280px-Underwater_World.jpg", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Fascinating Universe", "explanation": ["Imagine you're swimming in the ocean and suddenly feel a strong pull on your arm. You struggle to free yourself...", "An octopus's third heart pumps blood to its gills, helping it breathe underwater. This unique circulatory system allows it to survive in diverse ocean habitats."], "example": "The octopus's third heart (aortic heart) pumps oxygen-rich blood to its gills for respiration.", "whyItMatters": "An octopus's third heart is essential for its survival in various ocean environments."}, {"id": "e2ab3cac934d", "title": "Honey never spoils", "slug": "honey-never-spoils", "headline": "Edible honey preserved for 3,000 years in Egyptian tombs", "summary": "Honey never spoils \u2014 edible honey has been found in 3,000-year-old Egyptian tombs", "source": "Honey never spoils \u2014 edible honey has been found in 3,000-year-old Egyptian tombs", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-2, 6, 3, -2, 2, 3, 2, -4, -4, -4, 2, -10, 1, 0, 0, 1, -3, -2, -12, -1, 15, -2, 8, 0, 0, 4, -3, 2, -4, -20, 0, -10, -2, -1, -10, 6, 4, -1, -2, 5, 19, 3, -1, -4, -3, 4, -1, 0, 10, -2, -3, 2, 1, 5, -3, 3, 6, 5, -2, 1, -3, -8, -17, 5, 2, -5, -3, -9, -5, -2, -9, 7, 0, 6, 2, 3, 8, -8, -4, -8, 0, 4, 1, -7, -2, -8, 0, 2, 0, -5, 2, -3, -2, 5, -4, 4, -3, 10, 6, 46, -8, 7, -11, -6, 2, -2, -4, 0, 0, 8, 1, 7, 2, 2, 0, 4, 11, -2, -3, -3, -5, 5, 14, 1, 8, 3, 0, 11, 2, -2, 7, -4, 6, -3, -3, 6, 1, -4, 7, -7, -13, -12, 5, -7, -4, 4, 9, -2, -1, 0, 3, 3, 0, 7, 8, 0, 0, 3, -3, -7, -1, -7, -5, 7, -1, -8, -2, -2, 10, -2, 15, 8, -6, 4, 5, -2, -1, 1, 1, 8, -5, -4, 0, 7, 2, -9, -5, 8, 2, 4, 0, 2, -2, 2, 4, 1, -2, 3, -1, 6, 1, -1, -1, -2, 5, -3, 2, 1, 11, 3, -4, 6, -4, 0, 3, 3, 12, -4, 2, 2, 2, -12, -12, -33, -4, 1, -4, 10, -7, -3, -8, 8, -9, 4, 0, -7, 8, -3, 5, 4, -4, 2, 6, -1, -6, 1, -1, 4, -5, 19, 0, -5, -5, 5, -6, -6, -13, -3, 2, -4, -3, -7, 6, -7, 3, -2, -2, -3, 0, 6, -7, 7, 0, 2, 5, -4, 3, -8, 2, -1, 1, 0, 4, -7, -3, -1, 1, 5, -6, 2, -3, 5, -8, 2, 15, -8, -13, 10, 1, 3, -6, -4, 6, 4, -6, 6, 2, 5, 14, -3, -5, -2, -4, 10, -2, -1, -3, 3, 4, -32, 10, 5, 2, -3, -4, 0, 5, 4, 2, 11, -3, 7, -5, 2, -2, 2, -3, -3, -10, 1, 0, 17, 3, -10, 2, 0, 8, -2, -1, 4, 0, 6, -4, 2, 4, -3, -4, -6, 2, -6, 2, -7, 1, 2, -6, -1, -4, 2, 2, 2, -8, -4, 2, 1, 2, -1, -2, -4, 0, 1, 3, -4, 3, -5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/c/cf/Ancient_Olympia%2C_Greece2.jpg", "imageLicense": "CC BY-SA 2.0", "imageArtist": "John Karakatsanis from Athens, Greece"}, {"id": "9cb3305bf156", "title": "List of animal names", "slug": "list-of-animal-names", "headline": "Did you know a group of flamingos has a special name?", "summary": "A group of flamingos is called a 'flamboyance'", "source": "A group of flamingos is called a 'flamboyance'", "sourceUrl": "https://en.wikipedia.org/wiki/List_of_animal_names", "articleUrl": "https://en.wikipedia.org/wiki/List_of_animal_names", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [5, -1, 6, 2, 4, -2, 7, 0, -8, -9, -5, -4, 2, 2, -1, -2, -6, -2, -8, 3, 1, 0, -7, 5, -3, 0, 0, 2, -8, -9, 3, 2, 2, -7, -8, 5, -6, 0, -1, 8, -2, -2, -8, -3, -5, 3, 0, 3, -4, -8, 8, -9, 1, 5, -2, 7, 0, -7, -6, -7, 0, 4, -9, 5, -8, 2, 3, -3, 1, -7, -3, -3, 2, 3, 9, -1, -10, 0, -13, 7, -2, -4, -4, -11, 7, -2, 4, -5, -3, 7, -4, 2, 2, 6, 0, 1, 4, 1, 0, 44, 1, -5, 10, 1, 1, -2, -5, -4, -6, 9, 4, 4, 11, 1, 0, -17, 1, -2, -3, 2, 6, 4, 4, 3, 7, 4, 2, 6, 19, -1, -2, 7, 6, -7, 3, 10, 4, -4, 4, 6, 6, -11, 9, -4, -1, 3, -3, -2, -6, 22, -3, 0, -8, -5, -1, 1, 4, 13, 5, -5, 4, 1, 1, -2, 2, -15, 0, 5, -11, -7, -10, 3, -7, 2, -3, -5, 0, -3, -3, 0, 3, -2, -2, -7, 3, -6, -3, -4, 0, 3, 3, -3, 9, -2, -8, 6, 6, 1, 12, -5, -6, -6, 6, 2, 5, 12, 6, -5, 0, -2, -5, -4, -3, 6, -9, 6, -2, -6, -7, 0, 13, -9, -10, -29, -6, 0, -10, -4, 1, 2, -4, 5, 4, -1, -3, -4, -1, 3, 11, 1, -3, 3, 2, -8, 5, -6, -3, 2, 0, 15, 16, 0, -8, 9, 1, -1, 1, 8, 0, -3, -6, 0, -1, -3, 7, -1, -8, -2, 0, -8, 3, -2, 4, -4, 1, 6, 0, -3, 0, -8, -1, -8, 0, 5, -1, 6, -2, 4, 0, -2, 3, 11, 0, -1, 11, -1, 5, 5, -6, -1, -10, -6, 1, 10, -2, 4, 10, -1, 4, -7, 3, 6, -5, 0, -1, -5, 5, -1, 1, -29, 2, 3, 4, 5, 8, -3, -3, 8, 2, 10, 3, -1, -2, -7, 7, -1, -2, -10, 0, -3, -6, 24, -1, -3, 3, -3, 1, -3, 1, 4, -6, 7, -11, 8, 2, -4, -3, 8, -3, -6, -4, -5, -3, 11, 1, -4, -4, 3, 4, -9, -3, -4, 5, 5, -2, -1, 2, 9, 1, -3, 1, 10, 5, 5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Mother_sea_otter_with_sleeping_pup.jpeg/1280px-Mother_sea_otter_with_sleeping_pup.jpeg", "explanation": ["Imagine you're at a bird-watching event, and you spot a bunch of flamingos together. You wonder what to call them collectively.", "A group of flamingos is called a 'flamboyance'. It's like calling a group of friends a 'gang'."], "example": "You see a 'flamboyance' of flamingos waddling together.", "whyItMatters": "A 'flamboyance' is the term for a group of flamingos."}, {"id": "6f416e1e4610", "title": "Tardigrades can survive in space, boiling water, and temperatures near absolute zero", "slug": "tardigrades-can-survive-in-space-boiling-water-and-temperatures-near-absolute-ze", "headline": "Can tiny creatures survive the harshest conditions on Earth and beyond?", "summary": "Tardigrades can survive in space, boiling water, and temperatures near absolute zero", "source": "Tardigrades can survive in space, boiling water, and temperatures near absolute zero", "sourceUrl": "https://en.wikipedia.org/wiki/Environmental_tolerance_in_tardigrades", "articleUrl": "https://en.wikipedia.org/wiki/Environmental_tolerance_in_tardigrades", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 1, 8, 4, 2, -1, 2, 5, -6, 2, 1, -7, 5, 5, -5, -5, 3, 6, -3, 3, 11, -5, 4, -3, -2, 5, 3, 15, -4, -22, -3, -6, 2, -11, -3, 4, 11, -6, -3, 1, 4, 6, 2, -2, -7, 1, -3, -5, 7, -10, -3, -4, 1, 2, -1, -5, 6, 0, 2, -3, 1, -1, -9, 4, 4, -3, -8, -2, -1, -8, 4, 4, 1, 2, 0, -2, 4, -2, 2, 0, -3, -8, -1, -5, -3, -7, 6, 1, -2, 5, -7, 0, 3, -3, -6, 1, 1, -4, 3, 48, -1, 2, 0, 2, 1, 2, 5, -5, -4, -2, 1, -4, 4, 5, 5, -5, 3, -2, -7, 0, -12, -1, 10, 2, 13, -2, -2, 10, 0, 2, 7, -4, 1, -1, -5, 3, 2, -1, 2, -9, -3, -9, 6, -7, -7, -1, 3, -1, -3, 1, -7, -2, 2, -4, 3, -2, -3, 1, -8, -2, 3, 11, -1, 14, 0, 1, -2, 5, 3, 4, 3, 1, 4, -6, -1, -2, -9, -4, -2, 8, -4, -4, 6, 7, -2, 2, -7, 0, -6, 1, -1, -8, -6, 6, -3, 2, 8, -3, 1, -4, 7, 0, -4, 3, 12, -4, 12, 0, 3, 2, -1, -9, -2, 1, 3, 4, 6, -8, 1, 2, 14, -11, -2, -39, -6, -8, -8, 15, 2, 11, -4, 7, -13, 5, -6, 1, 3, 2, 0, -1, -2, -6, 3, 1, -1, 2, -3, 6, -6, 16, 7, 3, -4, -3, 4, -1, -13, 5, 0, 4, -9, -2, -11, -1, 13, 1, -6, -7, -1, -5, 6, -1, -3, -2, 7, 1, -7, -2, -5, -3, 6, -2, 6, 1, 1, 0, 0, -1, -3, -6, -3, 8, -8, 9, 15, -4, -4, 2, -9, 2, -3, 7, -1, 9, -1, 11, 2, -7, 8, -8, -7, 4, -3, 3, 2, 2, 5, 4, 8, -30, 2, 0, -13, -4, 0, 1, 6, 0, 5, 2, 4, 1, 9, 4, -3, 0, -4, 2, -7, 4, 4, 14, -3, 0, 5, -6, 11, -1, 1, 4, 5, 2, -9, -4, 13, 2, -3, 7, 0, 5, 0, 3, 1, 7, -6, -6, -1, -6, 4, -4, -3, 1, -7, 3, 3, 1, 0, -6, -8, 5, -4, -6, 6, 5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Mvey0290.jpg/1280px-Mvey0290.jpg", "imageLicense": "Public domain", "imageArtist": "Mr. Ben Mieremet, Senior Advisor OSD, NOAA", "explanation": ["Imagine you're planning a picnic on Mars, and you want to know if your favorite snacks can survive the trip.", "Tardigrades are like superheroes of the microscopic world, able to withstand extreme environments that would kill most life forms. They're the ultimate survivors, thriving in conditions ranging from boiling water to the vacuum of space, and even near absolute zero."], "example": "If you left a sample of tardigrades in a boiling pot, they'd still be alive once you cool them down.", "whyItMatters": "Tardigrades' resilience makes them the ultimate test for survival in extreme conditions."}, {"id": "017f84d8d294", "title": "The mantis shrimp can punch at 50 mph", "slug": "the-mantis-shrimp-can-punch-at-50-mph", "headline": "Mantis shrimp punch at 50 mph, faster than .22 bullet", "summary": "The mantis shrimp can punch at 50 mph \u2014 accelerating faster than a .22 caliber bullet", "source": "The mantis shrimp can punch at 50 mph \u2014 accelerating faster than a .22 caliber bullet", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-14, -7, 1, -1, 4, 0, 7, 1, 0, 0, 6, -2, 0, -1, 1, -1, 3, -1, -7, -1, 1, -2, 5, -3, 8, -3, -5, 4, -6, -24, 0, -4, 5, -11, -7, -3, -2, -7, 4, 2, 10, 9, 7, 3, -6, 7, -5, 0, 15, -2, -4, -12, 1, -1, 5, -15, 6, 1, 0, -5, 3, 2, -15, 7, -6, -10, -3, 3, 0, 6, -4, 8, 3, 8, 2, 7, 0, -1, 13, 4, -1, -8, -12, -3, -5, -4, 7, 1, 7, 6, -2, 6, -4, -4, -1, 7, -5, -5, -2, 42, 1, -3, 1, -2, 12, 11, 1, -2, -2, 5, 10, -4, -1, 2, 2, 2, 8, -4, -5, 0, -1, -7, 3, -3, 0, -3, 3, 14, 0, -1, 7, -6, 4, -1, 0, -2, 9, 0, -7, 1, -9, -10, 5, -8, -8, 7, -1, 0, -5, -5, -9, 1, 6, -1, -4, 0, -2, 6, 1, -6, -3, 3, -6, -3, 5, -4, 1, 2, 11, 1, 0, -1, -2, 5, 4, 1, 4, -2, 6, 5, 9, 6, -4, 6, -1, 2, -6, 7, 4, 1, 2, 5, -7, 14, -2, -4, -2, 4, -5, -2, 5, -9, -3, 5, 2, -2, -2, 2, -8, -1, -5, -7, -2, 2, -10, 3, 3, 7, -1, 10, -4, 7, 3, -35, -4, -1, -8, 16, -5, -1, -2, 8, 1, 2, -9, -5, 1, 3, 8, 2, 4, -1, 4, -2, -6, -10, 6, 9, 1, 17, -2, 7, -5, 0, 8, 1, 0, -1, -2, 5, -5, -2, 3, -8, 3, 7, -8, -2, -15, 4, 2, 2, 1, 2, 6, -1, 1, 1, -8, -7, 5, -3, 5, -5, 0, 5, -8, 1, -4, 0, -4, 0, -2, 6, 9, -1, -4, 9, 0, 2, -5, -1, 0, 2, 2, 6, 1, -2, -6, -4, -7, 1, -1, 9, -2, -3, -4, -10, -1, -35, 10, 9, 3, -5, -2, 4, -10, 0, 6, -7, 13, 1, 5, 0, -1, -1, 2, 2, -6, 0, -5, 15, 0, 1, 0, -5, -1, -3, -2, 1, 5, 8, -9, 1, 10, -1, 4, 0, -2, -6, -3, 0, 3, 7, -4, -4, -9, -1, 9, 3, -5, 0, 2, 4, 1, -5, -10, -4, 0, 8, 9, -4, 2, 1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Theatrum_Orbis_Terrarum%2C_by_Abraham_Ortelius%2C_World%2C_1572.jpg/1280px-Theatrum_Orbis_Terrarum%2C_by_Abraham_Ortelius%2C_World%2C_1572.jpg", "imageLicense": "Public domain", "imageArtist": "Abraham Ortelius"}, {"id": "33e0edc43f0a", "title": "Crows can recognize individual human faces and hold grudges for years", "slug": "crows-can-recognize-individual-human-faces-and-hold-grudges-for-years", "headline": "Can crows remember faces and hold grudges like humans?", "summary": "Crows can recognize individual human faces and hold grudges for years", "source": "Crows can recognize individual human faces and hold grudges for years", "sourceUrl": "https://en.wikipedia.org/wiki/Animal_cognition", "articleUrl": "https://en.wikipedia.org/wiki/Animal_cognition", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 0, 4, 8, -1, 6, 14, -5, -2, -4, -1, -7, -3, 4, -4, 1, -10, 3, -5, 0, -8, -7, 1, -1, -3, 6, -7, -4, -4, -19, 11, -2, 4, -4, -5, 1, 4, 3, -1, 7, -3, -5, -7, 2, -11, -2, -5, -9, -2, -6, 0, -6, 0, 7, -4, 9, 5, 7, 6, -3, 3, 2, -9, 6, -4, 8, -4, -7, -5, -4, 0, -3, 3, -9, -3, 8, 0, 1, -8, 3, -9, 10, 3, -5, -5, 0, -2, -8, -3, -4, 1, 2, 2, 0, -6, 1, -4, -2, -8, 43, 1, 4, -4, -3, 2, -1, 2, -9, -4, 3, -3, -4, -3, 7, 15, -1, 2, -4, -3, -5, 1, -2, 1, -4, 13, -1, 3, 11, -1, -4, 1, -8, -1, 0, -4, 5, -2, -4, 2, -5, 5, -9, 5, 7, -7, 7, 5, 2, 2, 7, -3, 4, -1, 1, 1, -1, 1, 1, 0, 3, 7, 2, -2, 3, 4, -2, 3, -4, 0, 0, 1, -1, 2, -3, -4, 5, -6, 2, -3, 1, -1, -2, 4, 4, 0, -6, -1, -6, 1, -3, 10, -2, 9, -12, -9, -4, 1, -2, 1, -3, -4, -4, -4, -2, 11, 6, -1, 1, 7, -7, -4, -8, -2, 0, -4, 9, 3, 0, 3, 0, 9, -9, -3, -35, -3, 4, -5, 6, -3, 9, 5, 9, 1, 2, -5, -6, 2, 3, 8, -5, 5, -1, 0, -5, 4, 5, -4, 7, 6, 22, 4, -1, 0, -7, 3, 1, -13, 7, 9, 0, -4, -1, -6, -8, 3, 8, -8, -8, 7, -1, 3, -1, 1, 4, 3, 2, -1, -1, -3, -6, 2, -7, 11, -1, -6, -5, -12, 8, 2, -4, -3, 4, 5, -2, 13, -4, -14, 10, -2, -5, -8, -10, 1, 8, -4, 2, 5, 8, 4, -4, -4, 11, -15, 9, 0, 0, -9, 10, 12, -30, 4, -4, 8, -3, 7, 1, 4, -2, -6, -4, 9, 2, 2, 1, 4, 5, -1, 3, -5, 1, 1, 20, 0, -3, -3, 4, -1, 4, -4, 18, 1, 4, -2, 4, 11, -9, -4, 5, 3, 7, 10, 2, 4, 12, 1, 4, -3, -3, -1, -2, -4, 3, -6, 3, 2, 5, 2, -2, -4, -1, 7, 2, 0, -4], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/5/50/AhuTongariki.JPG", "imageLicense": "CC BY 2.5", "imageArtist": "Ian Sewell", "explanation": ["Imagine you're walking home and you see a crow staring at you, remembering you from a previous encounter. The next day, you see the same crow avoiding you, acting as if it hates you.", "Crows can recognize individual humans and remember past interactions, showing a form of social intelligence."], "example": "The crow remembers you from yesterday and avoids you today.", "whyItMatters": "Crows exhibit complex social behaviors by recognizing and remembering individual humans."}, {"id": "d29cc1104eed", "title": "Trees communicate through underground fungal networks called the 'Wood Wide Web'", "slug": "trees-communicate-through-underground-fungal-networks-called-the-wood-wide-web", "headline": "Trees share nutrients via mycorrhizal fungi, forming the 'Wood Wide Web'", "summary": "Trees communicate through underground fungal networks called the 'Wood Wide Web'", "source": "Trees communicate through underground fungal networks called the 'Wood Wide Web'", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-2, -2, 3, -2, 6, -2, -2, -1, 8, 0, -1, -8, 2, 4, 6, 9, -2, 5, -6, 3, 11, -3, 4, -1, 5, 2, -5, 0, -2, -21, 3, 5, 2, 2, 2, -1, 4, -10, -4, 11, 7, 4, 3, 7, -2, -11, 6, 1, 6, -7, 1, -4, -2, 3, 4, 1, 10, 1, -1, 4, 7, 3, -16, 5, 10, 4, -12, 4, 8, 2, 3, 5, -6, 0, 7, 3, -4, 2, -2, -2, -3, 1, -5, 1, -4, -4, -2, -8, 0, 4, 2, -1, -3, -2, -6, -2, -2, -4, 0, 46, -10, -2, 4, 1, 0, 0, -6, -6, 4, 9, 5, -12, -6, 6, 5, -5, 5, 6, -4, -3, -3, 10, 5, 2, 10, 1, -5, 9, 5, 6, 1, 9, 3, -1, -6, 2, 9, -6, 3, 7, 1, 0, 0, -5, -2, 7, 6, 6, -4, 4, -2, 5, 3, -1, 0, -3, 4, -4, 3, 0, -11, 1, 0, 12, 8, -16, -1, 0, -2, -15, 5, 3, 8, -1, -7, -6, -8, -6, -3, -1, 5, -1, -1, 10, -2, -1, -7, 1, -3, -2, -3, 0, -8, 0, -3, -3, 2, 2, -7, 1, 1, -3, -4, 3, -8, -2, 1, 4, 3, -4, -8, -1, 0, 0, -8, 2, 6, 0, 3, 7, -1, -6, -5, -37, -6, 3, 0, 3, 0, -1, 0, -3, -1, 12, 6, -4, -4, 0, 5, 4, -2, -6, 3, 1, -6, 7, -4, 0, -4, 19, 5, 0, -2, 2, 6, -6, -7, -4, -1, 1, -5, -2, -6, -7, -4, -4, -9, 4, -2, -1, -7, 3, -9, 5, 8, 9, 6, 0, 1, 0, 0, -3, 0, -3, -1, -6, -1, 6, 1, -5, 3, 4, 3, 6, 9, -2, -1, 3, 7, -2, -7, 0, -4, 10, -14, 8, 3, 0, 3, 0, -5, 9, -8, -1, -4, 0, -18, 7, 1, -34, -1, 6, -2, -2, 8, 5, 4, 6, -4, 11, -1, 0, -1, 4, 7, 10, -2, 3, 1, 2, -3, 17, 0, 1, 5, -5, 6, 1, -3, 1, 6, 8, -2, 5, 11, 6, -3, 5, -3, -6, -7, -8, -5, 3, -8, -4, -5, 2, 6, -5, -1, 1, 5, -10, 2, -2, -6, -12, 1, -2, -6, -11, -2, 1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Amazon17_%285641020319%29.jpg/1280px-Amazon17_%285641020319%29.jpg", "imageLicense": "CC BY-SA 2.0", "imageArtist": "CIAT"}, {"id": "412c97a48612", "title": "Vehicle registration plates of California", "slug": "vehicle-registration-plates-of-california", "headline": "Blue whale's heart is the size of a small car", "summary": "The blue whale's heart is the size of a small car \u2014 you could crawl through its arteries", "source": "The blue whale's heart is the size of a small car \u2014 you could crawl through its arteries", "sourceUrl": "https://en.wikipedia.org/wiki/Vehicle_registration_plates_of_California", "articleUrl": "https://en.wikipedia.org/wiki/Vehicle_registration_plates_of_California", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [1, -3, -2, 1, 1, 4, 4, 2, 3, 1, 3, -9, 3, 0, -1, -3, 2, -2, -3, 3, 8, 5, -4, 1, -1, 5, 6, 4, -6, -16, -6, -4, 5, 4, -2, 7, 1, -3, -1, 9, 3, 8, 2, 4, 4, 0, -3, 1, 7, -3, -10, -4, 0, 6, -3, -6, 14, 1, 5, -1, 11, 4, -8, 5, 6, -1, -7, 0, -2, 7, 7, -9, 2, 2, 1, -6, -5, 6, 0, 1, -2, -3, -9, -3, -2, -4, 3, -10, -5, -1, -9, 1, -1, 2, -3, -4, -8, -3, 2, 48, 2, 6, 0, -2, 2, 5, -4, 1, 8, 3, 6, 0, -5, -7, 0, -7, -6, 3, -4, 6, -18, -6, 9, -6, 5, -6, 0, 5, 9, -2, 5, -1, -5, -6, 4, -6, 4, 6, -2, -1, -3, -7, 0, -6, -14, 7, 8, 9, -5, -1, -7, 7, -4, -2, 3, -7, -1, 7, -4, 0, -2, 0, -3, -4, 7, -7, 0, 2, 5, -3, -10, 10, -8, 5, 6, 3, 4, 1, -4, 6, 0, -2, -1, 2, -3, 3, -9, -3, 0, -2, 12, 5, 4, 8, -9, -5, 3, 0, -8, 5, 4, -7, -9, 7, -2, -5, 4, -3, -6, -6, -5, -3, -2, 3, 6, 7, -1, 0, 3, -7, 2, -7, 5, -37, -7, -11, -1, 4, -9, -1, 0, 12, -4, 2, -9, 0, 3, -4, 4, -3, -5, -2, 5, -6, -2, -8, -2, 6, -1, 26, 3, 0, 0, -4, 4, -6, -2, 4, -2, 2, -1, -3, -6, -14, 3, 0, -6, -1, -2, -4, -2, 1, 4, 2, 5, 2, -1, 10, 0, -6, -8, -4, -5, -5, 2, 6, -8, -6, 2, 0, 7, 1, -4, 1, 13, 0, -8, 12, 1, 9, -2, 9, -3, 5, -13, 6, 6, 4, -2, 3, -5, -3, -4, 9, 2, -1, -5, -4, 4, -31, 4, 2, 3, -3, -3, -3, 0, 1, -5, -3, 4, 11, 8, -4, 5, 4, 4, 2, 1, -1, -3, 20, 8, -3, 1, -6, 7, 0, 3, 7, -1, 5, -2, 1, 0, -1, 4, 4, 2, 5, 6, 3, -3, 6, -1, -4, 3, 1, 6, -3, -5, 2, -4, 5, -1, -6, -12, 7, -7, 4, -1, 0, 11, 13], "explanation": ["Understanding the size of the blue whale's heart provides insight into the challenges faced by marine biologists studying these animals. The heart's size poses unique challenges for research and conservation efforts. Recognizing this helps us appreciate the dedication required to study and protect these magnificent creatures."], "whyItMatters": "This fact highlights the remarkable size and biological adaptations of the blue whale, emphasizing the importance of marine biology and conservation efforts.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/4/4a/California_2018_License_Plate.jpg"}, {"id": "da74d9b361c5", "title": "Sharks are older than trees", "slug": "sharks-are-older-than-trees", "headline": "Sharks (400 million years) > Trees (350 million years)", "summary": "Sharks are older than trees \u2014 sharks appeared about 400 million years ago, trees about 350 million", "source": "Sharks are older than trees \u2014 sharks appeared about 400 million years ago, trees about 350 million", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 2, 2, -1, 2, 4, -5, -2, 9, 5, 6, -9, 2, 2, -8, 8, -4, -6, -16, 2, 6, 6, 1, 1, -1, 5, -7, 2, 4, -15, 2, -7, 10, 1, 0, -1, 4, -5, -8, 7, 11, 7, 1, -6, -3, -8, -5, -1, 6, 1, 2, -8, -3, 6, -3, 5, -1, -3, -1, 0, 8, -4, -17, 9, 2, 3, -1, -4, 4, 2, -4, 2, -6, 1, 5, -1, -1, -4, 4, -4, 6, -3, -3, -4, -2, -4, -1, 1, 3, 1, 1, 0, 5, 7, -4, -3, 11, 4, 6, 45, -5, 4, 1, -2, 8, 3, -8, -3, 8, 6, -3, 3, 0, 1, 1, -6, -1, 4, 0, -1, -6, -4, 7, 2, 8, 0, -1, 6, 8, 0, 4, -5, -4, 1, -4, -3, 2, 2, 1, -12, 0, -8, 2, 4, -7, 4, 7, 5, -5, 6, -2, 5, 7, -1, 2, -5, 5, 0, 5, -5, 4, 9, -3, 3, 6, -9, 1, 3, 8, 3, 6, 4, 3, 0, 4, 2, -9, -2, -5, 4, -4, 1, -1, 3, 0, -6, -10, 5, 1, 6, 11, -9, 0, 2, -1, 1, -2, -3, -1, -4, -11, -6, 1, -4, -5, -1, 4, -1, 4, -5, -12, -6, 2, 0, -7, 4, 2, -4, 2, -2, 2, -12, 1, -32, -9, 2, -3, 16, -2, -2, -1, 0, -10, -16, -2, -2, -5, 3, 11, 8, -2, -3, -8, -6, 3, -4, 2, 2, -7, 24, 2, -14, 9, -2, -8, -6, -3, 1, -1, 5, -3, 2, -2, 0, -1, -2, 2, -5, 1, 4, 0, 3, -7, 5, 4, 1, 6, -7, -3, -11, 4, -3, 0, -6, -2, -3, -5, -1, -7, -3, -5, 0, -1, 3, 11, -1, -16, 6, 7, -5, -8, 7, 3, 9, -19, 8, -2, 12, -2, -3, 5, -2, -9, 3, -7, -6, -4, 1, 7, -30, 8, 10, 4, -1, 2, 2, 5, 8, 3, 7, 1, 3, 4, -4, -2, 4, -1, 1, -4, 5, -3, 13, 5, 6, 4, -3, 6, 9, 2, 8, 3, 8, -7, -1, 9, -1, 2, -3, -2, 1, 0, -7, 1, 15, -6, 1, -5, 1, 7, -4, -6, 5, 3, 2, 1, 3, -4, -3, -11, 1, -7, -9, 0, 7], "imageUrl": "https://upload.wikimedia.org/wikipedia/en/thumb/1/1e/At_the_South_Pole%2C_December_1911.jpg/1280px-At_the_South_Pole%2C_December_1911.jpg", "imageLicense": "PD-US", "imageArtist": "Olav Bjaaland (1863-1961)[1]"}, {"id": "159c01dd0c3a", "title": "A single teaspoon of soil contains more microorganisms than people on Earth", "slug": "a-single-teaspoon-of-soil-contains-more-microorganisms-than-people-on-earth", "headline": "Did you know a teaspoon of soil teems with life?", "summary": "A single teaspoon of soil contains more microorganisms than people on Earth", "source": "A single teaspoon of soil contains more microorganisms than people on Earth", "sourceUrl": "https://en.wikipedia.org/wiki/Soil_microbiology", "articleUrl": "https://en.wikipedia.org/wiki/Soil_microbiology", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [5, -1, 3, 6, 12, -7, 7, 0, 3, 5, 0, -10, 3, 2, -1, -3, -4, -3, -4, 0, 13, 2, -4, -5, 6, 1, -2, -7, -1, -18, 4, 2, 7, 1, -3, 2, -2, -8, -3, 3, -1, 3, 7, 4, -9, 0, 3, 0, 9, -7, -7, -4, 1, 8, -7, -8, -2, 1, -3, -1, 3, -5, -6, 2, 7, -4, -3, 2, 8, -3, -1, 11, 4, 11, 0, -1, 3, 0, 2, -5, -2, 9, 2, -6, -10, -6, 1, -1, 4, 10, 5, -4, -5, 3, -4, -3, -1, 1, 2, 48, -4, -3, 3, -1, -1, 1, 1, -1, 2, 0, 5, -7, -3, 4, -2, -5, 13, -5, -5, -2, -1, 0, 9, -9, 1, -1, 4, 10, -1, 1, 8, -4, 1, -1, 1, 4, 5, -2, 2, 0, -3, -5, -13, -9, -18, 5, 3, 5, 3, -3, -2, 9, 2, -1, 10, 0, 5, 1, -3, 3, -1, 11, 0, 12, 3, -6, -2, -3, 1, -4, 4, -7, -3, 5, 1, -2, -1, 1, 7, 0, 5, 9, 5, 8, 4, 1, -6, 2, -6, -6, 2, 0, 0, 2, 2, 3, 7, 7, 2, -2, 4, 2, -7, -2, -2, 2, 7, -1, 4, -2, 0, -4, -8, 4, 2, 1, 4, -1, 4, 3, 1, -13, -11, -44, -6, -4, -7, 12, -4, 0, 4, -1, 4, 3, 0, 1, -3, -2, 2, -2, 1, -2, 3, 7, -9, -3, 1, 8, -13, 13, 7, 0, -2, -1, 4, 4, -15, -5, -2, 1, -4, -4, -2, -2, 7, -1, -13, -10, -8, -1, 1, -3, -3, 0, -1, 3, 4, 2, 1, -4, -5, -4, 5, -7, 3, 5, 1, 6, 2, -5, 0, 8, -6, 3, 10, -2, 5, -1, -1, -1, 0, -6, -5, 6, 3, 1, -1, 2, 2, -6, -8, 0, 4, 5, -3, -2, -3, 0, 0, -33, 4, 5, 4, -3, 9, 0, 8, 9, 2, 8, -1, 6, 1, 5, 2, -7, -1, -4, -3, 5, 3, 14, 4, -9, 7, 3, 2, -2, -5, 1, 1, 4, -5, 0, 4, 4, -1, 2, 1, -3, -7, -12, -1, 9, -10, 2, -15, 1, 0, -11, -1, -1, 8, 1, 8, -3, -2, -4, -9, -1, -6, -10, 9, -5], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Coral_Outcrop_Flynn_Reef.jpg/1280px-Coral_Outcrop_Flynn_Reef.jpg", "imageLicense": "CC BY-SA 3.0", "imageArtist": "Toby Hudson", "explanation": ["Imagine you're planting a garden; tiny organisms beneath your feet are crucial for your plants' health.", "Underneath our feet, a hidden world thrives, full of tiny workers that help plants grow. These microorganisms form a bustling community, known as the rhizosphere, which is vital for a healthy garden."], "example": "In one gram of soil, there can be up to 10 billion bacteria, each playing a role in nurturing your plants.", "whyItMatters": "A teaspoon of soil is a universe of microorganisms, essential for plant growth."}, {"id": "c82cb02340a7", "title": "Observable universe", "slug": "observable-universe", "headline": "There are more stars in the universe than grains of sand on all of Earth's beaches", "summary": "There are more stars in the universe than grains of sand on all of Earth's beaches", "source": "There are more stars in the universe than grains of sand on all of Earth's beaches", "sourceUrl": "https://en.wikipedia.org/wiki/Observable_universe", "articleUrl": "https://en.wikipedia.org/wiki/Observable_universe", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [2, -4, -8, 1, 6, 2, 4, 3, 8, 2, -1, -9, 2, -1, -3, -5, 1, -5, -8, 1, 11, 2, 0, 1, 5, -5, -2, -7, -6, -18, 0, -4, 1, -2, -5, -4, 11, -4, -3, -2, 3, -6, 6, 3, -1, 2, -2, -1, 3, -6, 3, -8, -5, 6, -8, -1, -6, 6, 0, 3, 0, 6, -15, -3, 12, -6, -2, -3, 0, -8, 2, 8, 0, 7, 4, -3, -2, 2, -9, -5, 5, -2, 1, -4, -7, -2, -6, -1, -3, 4, -2, -5, 2, 0, -1, 1, 3, 8, 12, 46, -4, -5, 4, 5, 3, -7, 1, 3, 5, 8, 7, -2, -4, 6, -3, -8, 8, -4, -4, -2, -6, 0, 6, -2, 2, -2, 0, 0, 4, 0, 2, -6, -9, -2, 0, 3, 6, -1, 8, -4, 1, -9, 9, -4, 2, 4, 2, 1, -4, 1, -1, 8, -9, 5, -2, 8, 3, 1, -4, 1, 4, 14, 9, 9, 9, 3, -6, 0, -7, -2, 7, 3, -10, 1, 10, -4, -11, -4, -2, 10, 3, -5, 1, 9, 0, -2, -6, 9, 2, -11, 6, 1, -1, 8, -1, 1, 7, -2, 2, -2, -5, -2, -2, 2, -3, 0, 1, -2, 4, -5, -5, -6, -1, -1, -6, 5, 10, -6, -1, 5, 5, -6, -12, -38, -11, -3, -4, 13, 2, -1, 6, 6, -5, -5, -12, -2, -3, -2, 0, -7, -3, 0, -1, 0, 8, -9, 3, 7, -3, 16, 9, 0, 1, 3, 2, 0, 1, 7, 2, 7, -1, -1, -1, 6, 8, -8, -4, -9, 3, 3, 4, 5, -3, -5, 6, -2, -2, -2, 3, -10, -2, -4, 13, 5, 1, -3, 0, 9, 0, -8, -6, 1, 2, -2, 11, -8, -12, 0, -1, 6, 5, -1, 2, 12, -1, 3, 5, -1, 1, -1, -6, -10, -5, -2, 1, -7, -2, 0, 6, -34, 14, 1, 5, -3, 3, 3, 11, 7, 3, 2, 0, -3, 0, -6, 3, 4, -4, 8, 1, -1, 2, 18, -2, -1, 10, -1, -3, 9, -5, 4, 1, 1, -2, -6, 8, 2, 3, -2, -6, 9, 1, -9, -3, 12, -3, 2, -7, -4, -9, -5, -7, -1, -1, 1, 3, -6, 0, 0, 4, 3, -2, -2, -1, 3], "explanation": ["The observable universe is vast, with a radius of about 14.26 gigaparsecs, indicating an immense expanse filled with countless stars. This vastness implies that the number of stars far exceeds the grains of sand on Earth's beaches.", "The observable universe encompasses all matter that can be observed from Earth, including the electromagnetic radiation emitted by these astronomical objects. This radiation has traveled through space since the beginning of the cosmological expansion, highlighting the sheer scale of the universe.", "The observable universe's size is limited by the speed of light and the age of the universe, which is about 14 billion years. This limitation means that there are countless stars beyond our observable horizon, further emphasizing the vast number of stars compared to the grains of sand on Earth."], "whyItMatters": "Understanding the scale of the observable universe helps us grasp the immense number of stars it contains, compared to the relatively small quantity of grains of sand on Earth.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Observable_Universe_with_Measurements_01.png/1280px-Observable_Universe_with_Measurements_01.png"}, {"id": "63f230b5b8d9", "title": "Venus", "slug": "venus", "headline": "Why does a day on Venus last longer than a Venusian year?", "summary": "A day on Venus is longer than its year \u2014 it rotates so slowly it takes 243 Earth days", "source": "A day on Venus is longer than its year \u2014 it rotates so slowly it takes 243 Earth days", "sourceUrl": "https://en.wikipedia.org/wiki/Venus", "articleUrl": "https://en.wikipedia.org/wiki/Venus", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-3, -2, 3, 6, 3, -6, -2, -1, 5, 3, 2, 1, 4, 3, -3, -5, -1, -5, -2, 2, 4, -5, -5, 11, -1, 9, 0, -2, -7, -20, 2, -3, 2, -3, -2, 3, -2, -3, -12, 3, 5, 2, 5, -1, -5, 6, -2, 5, 0, -3, -8, -1, -2, 4, 0, 6, -1, 10, 1, 0, 6, -5, -15, 6, 1, -2, -4, -5, 3, -4, -1, -2, -4, 11, 4, 6, 0, 1, -4, -4, 10, -3, -7, 0, 3, 1, -9, 0, 7, 11, 1, 3, -1, -1, 1, 1, 7, 12, -2, 34, -4, 10, -9, 8, 2, 3, -6, 0, -5, -1, 2, 4, 4, -12, -3, -10, 10, 2, -6, 10, -9, -5, 5, 2, 5, 6, 7, 6, 0, 0, 13, 3, -7, -2, 9, -2, -1, 0, 5, -10, -8, -7, 1, 3, -3, 6, -1, 0, 2, -1, -8, 5, -1, -7, -1, 3, 4, 4, -9, -2, 3, 5, -2, 4, 11, -4, 4, 1, -5, -4, 10, 4, -1, -2, 13, -5, 5, 7, 15, 1, 1, 0, 3, 7, 0, -5, -5, 6, -3, -5, 11, -2, 0, 10, -10, -7, 5, 8, -4, 5, 1, -5, 7, 1, 3, -2, 7, 0, -1, 3, -6, -6, 4, -8, -9, 10, -2, -4, 5, 0, 4, -10, 3, -37, -7, -6, -5, 17, 0, -3, -6, 5, 0, 4, 0, 4, -4, -1, 4, 0, 6, -3, -9, -3, 0, 0, -12, -1, 2, 12, -4, -11, 2, 3, 0, 1, -3, -3, -2, 10, -5, -8, -5, 4, 4, 2, 4, -3, 9, 6, 1, 0, -1, 1, 8, -2, -6, 1, -1, -15, 4, -5, 5, -3, 2, 3, -2, 3, 1, -6, -6, 1, -5, -2, 11, -15, -12, 12, -9, -1, 10, 8, 4, 8, -11, 9, 6, 3, -8, 1, -2, 3, 1, 5, 4, -7, 2, 4, -2, -37, 4, 6, 3, -2, -1, -3, 10, -2, -3, 3, 5, -3, -3, 1, 5, -3, 1, -3, -1, 7, -3, 9, 0, -6, 1, -1, 7, 4, -15, -10, -1, -1, 2, -2, 3, -4, 9, -2, -5, -3, 5, -1, -4, 15, -12, -3, -2, -2, -1, -2, -2, -8, 10, -6, -9, 4, -2, 4, 2, -1, -4, 1, -7, 4], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/b/b2/Venus_2_Approach_Image.jpg", "explanation": ["Imagine you're planning a trip to Venus and want to know how long your day would be compared to the time it takes Venus to orbit the Sun.", "Venus spins very slowly on its axis, meaning it takes a Venusian day (one full rotation) much longer than it takes to complete one orbit around the Sun (one Venusian year). This is why a day on Venus is longer than its year."], "example": "A Venusian day is 243 Earth days long, while a Venusian year is about 225 Earth days long.", "whyItMatters": "A Venusian day lasts longer than a Venusian year due to Venus's slow rotation."}, {"id": "3e235eb70292", "title": "Footprints on the Moon (1975 film)", "slug": "footprints-on-the-moon-1975-film", "headline": "Moon's footprints will outlast Earthly erosion", "summary": "The footprints on the Moon will last millions of years \u2014 there's no wind or water to erode them", "source": "The footprints on the Moon will last millions of years \u2014 there's no wind or water to erode them", "sourceUrl": "https://en.wikipedia.org/wiki/Footprints_on_the_Moon_(1975_film)", "articleUrl": "https://en.wikipedia.org/wiki/Footprints_on_the_Moon_(1975_film)", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-6, 1, 9, 5, 3, 3, -4, -6, -6, 3, -1, 0, 1, 6, -6, -2, -2, 11, -1, -1, 16, 2, 5, 1, -7, 14, -4, -3, -5, -19, 1, -8, -4, 2, -7, 0, 2, -4, -1, 6, 4, 8, 0, -3, 3, 5, 3, -5, 0, -4, -5, -5, 4, 1, -1, 2, -3, 9, 6, -3, 6, -1, -15, 3, 8, -6, -4, -3, -1, 1, 1, 4, 8, 4, 1, 8, 0, 2, -5, -2, 5, 7, -3, -6, -3, 1, 0, 3, 2, 6, 4, -3, 5, 6, 5, 1, 3, 3, 4, 45, -13, 12, -3, -1, 2, -6, 2, -4, 0, -1, 2, 0, -4, -1, 0, -6, 4, -7, -9, 3, -11, 0, 4, 1, -2, 0, 1, 10, 1, 3, 9, -7, -9, 3, -2, 5, 2, -7, -1, -6, -2, -2, 7, -8, 6, 6, 6, -7, 2, -3, 0, -1, 10, -1, -4, 4, -3, 5, -7, 5, 2, 5, -3, 0, 0, -3, 2, 0, 11, 2, -1, 0, 2, -6, 7, 0, -5, -8, 1, 2, -6, -3, 0, 6, 1, -4, -6, 2, 2, -3, 5, 0, -1, -3, 0, 2, -4, 0, -2, 1, 1, -6, -5, -5, 11, 5, 3, 2, -1, 1, -3, -9, 1, -5, 4, 1, 9, -5, 7, 4, 7, -11, -11, -37, -9, -4, 4, 13, -8, 7, 1, 1, -8, 7, -5, -4, -1, -3, 0, 6, -2, -3, -4, 1, 0, -2, -8, 5, -7, 20, 5, -4, -7, -2, 3, -3, -12, 3, 6, 3, -6, 0, 0, -8, 6, -4, -4, -8, 1, -8, -3, 3, 0, 2, 3, 0, 0, 3, -2, -1, 8, -2, 0, -7, 1, -4, -6, 12, -4, 0, 1, 4, -4, 4, 16, -10, -18, 7, -1, 6, 0, 0, 2, 11, -9, 2, 3, -1, 7, -4, -10, 1, -2, 5, 2, -5, -2, 7, 4, -33, 4, 3, 0, -1, 1, 4, 11, 7, 5, -6, 13, -3, -9, 3, 0, 8, -1, -7, -6, 0, 2, 15, 3, 1, -2, -7, 5, 2, -7, -1, 2, 4, -2, -1, 13, 5, -5, -5, -3, 7, 5, 10, 1, 12, -13, -5, 2, 2, -1, -13, -2, -2, 2, -2, 6, 2, -2, -2, -1, 4, -2, -8, -2, -1], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/A_Man_on_the_Moon%2C_AS11-40-5903_%28cropped%29.jpg/1280px-A_Man_on_the_Moon%2C_AS11-40-5903_%28cropped%29.jpg", "imageLicense": "Public domain", "imageArtist": "Neil A. Armstrong", "explanation": ["Imagine walking barefoot on a beach, leaving footprints that gradually fade away due to wind and water.", "On the Moon, without wind or water, footprints would remain visible for millions of years, unlike on Earth where they erode quickly."], "example": "On Earth, a day's walk might erase your footprints in hours, but on the Moon, those same footprints could last for millions of years.", "whyItMatters": "Footprints on the Moon will last millions of years because there's no wind or water to erode them."}, {"id": "f26bcd5ac003", "title": "Sun", "slug": "sun", "headline": "The Sun makes up 99.86% of all mass in the solar system", "summary": "The Sun makes up 99.86% of all mass in the solar system", "source": "The Sun makes up 99.86% of all mass in the solar system", "sourceUrl": "https://en.wikipedia.org/wiki/Sun", "articleUrl": "https://en.wikipedia.org/wiki/Sun", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-6, 3, -6, -5, 1, 3, 6, -1, 3, 8, 4, -8, 1, 9, 2, -4, 2, -4, -5, 0, 10, -10, -1, -1, 9, 6, -3, 0, -5, -26, -1, -10, 6, -5, 2, -1, 6, -8, -2, -1, -3, -4, 2, 1, -7, 11, -1, 4, 11, 2, 6, 1, -5, 12, -5, 1, 3, 5, 8, 1, -5, 7, -17, -1, 9, -2, 3, 0, 2, -3, -6, 2, 0, 2, -4, -2, -2, -15, -5, -6, 0, 6, -11, 5, 8, 1, 2, 4, 7, 3, -9, -5, -1, 2, 1, 2, -1, -1, 14, 41, -1, 7, 3, 3, 3, 0, 8, 4, 0, 5, 2, 6, -4, -5, 1, -9, 7, 3, -4, -2, -4, 2, 11, 8, 4, 1, 2, 5, 5, 1, 5, -6, -6, 0, -2, 3, 1, -3, 3, 0, -1, -6, -4, -9, -3, 18, -2, 2, -1, 3, 0, 10, 0, 3, 1, -2, -4, 4, -1, -1, -2, 5, -9, 11, 3, -2, -5, 6, -2, 3, 1, 5, 0, -6, 16, -11, -8, 5, 4, 5, 10, 2, 0, 3, 2, -7, -14, 3, -4, -6, 3, 2, -3, 2, -12, -7, 5, 1, -10, -2, -1, 0, -2, 2, 3, 0, -1, -2, 7, 3, -3, -5, -4, -3, -10, -1, 4, 0, 4, -4, 2, -8, -11, -36, -2, 3, -8, 8, -1, 4, 0, 5, -1, 5, -3, 3, -5, -3, -4, -1, -1, -1, -8, -1, 1, -11, -1, 6, -1, 11, 2, 0, 1, -6, -3, -2, -1, 9, 0, 1, -4, -3, 1, 2, 3, -13, -3, 4, -1, 5, 1, 8, -4, 12, 0, 2, -3, 1, 1, -11, -1, 1, 14, -4, -2, 3, 1, -4, -5, -10, -9, 6, -1, 0, 9, -4, -8, 8, 2, -1, -1, 3, 4, 6, -6, 1, 5, 3, -2, 4, -2, -5, -12, -2, 2, 2, -1, -3, -1, -32, 3, -7, 1, 1, -4, 10, 12, -7, 5, 1, 5, -1, 3, 2, -3, 3, -2, 3, -4, 4, 1, 19, 4, -3, 8, -3, 10, 5, 7, 1, -1, -1, 6, -5, 11, 0, -2, -3, 0, 3, 0, -1, 4, 9, -12, 8, -18, 0, -3, -4, 1, 0, -1, -11, -3, -5, 2, 2, -4, -4, 1, 2, 3, 4], "explanation": ["The Sun's dominance in mass is a fundamental aspect of our solar system's structure. This overwhelming mass concentration influences gravitational forces, dictating the orbits of planets and other celestial bodies. Understanding this helps us comprehend the Sun's role as the central gravitational anchor of the solar system.", "The Sun's mass also explains why it is the primary source of energy for life on Earth. The energy radiated from the Sun, through nuclear fusion reactions in its core, is essential for maintaining Earth's climate and supporting biological processes. This highlights the Sun's critical role in sustaining life on our planet.", "The Sun's mass contributes to its gravitational pull, which affects the motion and stability of the entire solar system. This gravitational force keeps the planets, asteroids, and comets in their respective orbits around the Sun. Recognizing the Sun's mass helps us understand the dynamic interactions within our solar system."], "whyItMatters": "Recognizing the Sun's mass is crucial for understanding the gravitational forces that govern the solar system's structure and the Sun's role as the primary energy source for life on Earth.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/The_Sun_in_white_light.jpg/1280px-The_Sun_in_white_light.jpg"}, {"id": "d4cf6e227bf1", "title": "Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons", "slug": "neutron-stars-are-so-dense-that-a-teaspoon-of-their-material-would-weigh-about-6", "headline": "Neutron stars: teaspoon weighs ~6 billion tons", "summary": "Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons", "source": "Neutron stars are so dense that a teaspoon of their material would weigh about 6 billion tons", "sourceUrl": "", "articleUrl": "", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -3, 3, -11, -1, 2, 4, -2, -1, 0, 5, -8, 0, -2, 2, -4, 3, -6, -9, 8, 9, -6, -2, -1, -4, 5, -6, -3, -6, -23, 5, -4, 6, 0, 2, 1, 7, -6, -1, -4, 1, 4, 10, 2, 0, 4, -4, -8, 11, 2, -5, -3, 4, 3, 7, 5, 7, -8, 4, 1, -5, -1, -9, 0, 16, 0, -10, 1, 4, 3, 2, 7, -6, 4, 3, 2, -2, -4, 7, -3, -2, 5, -7, -5, -8, -5, 0, 5, 0, 0, -4, -2, -9, 3, 1, -2, -5, -3, 8, 44, 1, -3, 1, -4, 2, 0, 4, 7, -2, -1, 7, -1, 6, -4, -2, -2, -2, -1, -8, -4, -3, 0, 8, -4, -2, -2, -9, 7, -2, 5, -6, -1, 2, -2, 1, 2, 8, -9, 1, 7, -9, -10, -4, -5, -9, 6, 0, 6, 3, 3, 3, -1, -3, -4, 10, -2, 1, 5, -11, 6, 2, 7, 5, 5, 11, 2, -11, 0, -1, -6, -6, 7, -2, 0, 12, -3, 0, -12, 9, -4, -3, 2, 3, 9, 0, 1, -1, -4, -8, -6, 3, 5, -4, 4, -3, 1, 1, 6, -1, -5, 4, -1, 5, 4, -1, 3, 7, 6, 2, -2, 2, -6, 1, -2, -2, 2, 11, -5, 0, 1, 5, -17, -12, -39, -4, 0, -10, 16, 8, 2, 1, -4, -1, 5, -2, -10, -6, -6, -1, -3, 4, -5, 1, -4, 0, -16, 11, 5, 2, 16, 6, -5, -1, 2, 4, 1, -3, 3, 3, 2, 2, -2, 3, -8, 3, -3, -11, 0, -5, 2, 6, 1, 2, 1, 5, 2, 0, 2, -8, -8, -4, -2, 6, -10, 1, -2, 6, -3, -7, 5, 0, -1, 0, -3, 11, -5, -4, 0, -4, 2, 9, 0, -4, 2, 7, 2, 4, 1, 3, 2, -10, 0, 4, 4, 1, -2, 3, -1, 4, -37, 8, 7, 3, 1, -3, 9, 6, 1, 7, -2, 1, -2, 3, 2, -8, 0, 6, 2, -1, 1, 0, 18, -3, -2, 6, -2, 13, -1, 6, 5, 0, 1, -9, -3, 9, 3, 4, 5, 1, 7, 1, -8, -6, 7, 3, -3, -4, -7, -1, 2, 3, -4, -6, 4, 1, -4, 8, 1, -6, -2, -3, -9, 6, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Battle_of_Scheveningen_%28Slag_bij_Ter_Heijde%29%28Jan_Abrahamsz._Beerstraten%29.jpg/1280px-Battle_of_Scheveningen_%28Slag_bij_Ter_Heijde%29%28Jan_Abrahamsz._Beerstraten%29.jpg", "imageLicense": "Public domain", "imageArtist": "Jan Abrahamsz Beerstraaten"}, {"id": "12d661d84494", "title": "Saturn in fiction", "slug": "saturn-in-fiction", "headline": "Would Saturn float if it were in a bathtub?", "summary": "Saturn would float in water \u2014 its density is lower than water's", "source": "Saturn would float in water \u2014 its density is lower than water's", "sourceUrl": "https://en.wikipedia.org/wiki/Saturn_in_fiction", "articleUrl": "https://en.wikipedia.org/wiki/Saturn_in_fiction", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [1, -3, 2, -5, -4, 2, 7, -1, 2, -5, 0, -2, 7, 8, -2, -2, 6, 7, -11, 5, 3, 1, 2, -5, -10, -1, -3, 6, -2, -17, 0, -5, -10, -3, 0, -4, 4, -9, 1, 0, -3, 1, -6, 4, 8, 0, 1, -2, 7, -2, -2, -7, -4, 2, -2, 6, -2, 0, -1, 6, 5, 1, -9, 5, 11, 8, -5, -7, 2, -4, -2, -1, -3, 5, -4, 1, 0, 0, -2, -1, 10, -4, -7, 3, -6, 6, 2, 1, -1, -2, -7, -4, -1, 0, 3, 10, 7, -1, 5, 37, 9, 3, -1, -5, 1, 3, 6, 1, 3, 6, 11, 0, -3, -5, -7, -6, 6, -5, -12, -6, -10, 0, 11, 0, 1, 0, 1, 2, -5, 5, 4, -10, -2, -2, 2, 0, 9, -8, -2, 1, -10, -11, 4, -6, -3, 8, -5, -2, 1, 2, -1, 3, 2, 1, 4, -9, -1, 14, -3, 3, -3, 4, -6, 3, -1, 5, 0, 3, 9, 2, -5, 11, -4, 0, 14, -2, -6, -1, 5, 2, -6, 3, 6, 5, 9, -5, -8, 8, 1, 2, -5, -7, -2, 9, -5, -6, 1, 3, -1, 9, 5, -2, 0, -2, 5, 9, 14, -2, -2, 4, -9, -5, 0, -3, -1, -2, 3, -1, 2, -7, 8, -12, -10, -37, 0, -6, 0, 15, -1, -3, -4, 1, -11, 3, -5, 0, 0, 4, -9, 5, 2, 3, -3, -5, 4, -3, 1, 4, -10, 19, -1, 7, 5, 3, -3, 8, 0, -5, 9, 3, -1, -11, -2, -9, 2, -3, -11, -1, 0, 0, 2, -3, 1, 3, 1, -7, 2, 1, 2, -2, -4, -5, 4, 0, 11, 10, -4, -6, 0, -7, -4, 2, -8, 3, 12, 0, 14, 10, 2, 9, 7, -4, 6, -7, -11, 8, 3, 4, 6, -7, -9, -6, 0, -4, 3, -6, 12, -1, 2, -31, 8, -1, 3, -5, -10, 6, 9, -7, 5, -1, 0, -6, 5, 1, 1, 5, -4, -4, -5, 9, 8, 18, 1, -3, 3, 2, 10, 1, 7, -15, 8, 0, -5, 2, 3, -2, -1, 6, -7, -3, 3, 0, 2, -1, 2, 4, -5, 2, -3, -8, -5, -3, -8, 9, 3, 1, -2, 7, -6, 2, -10, 3, -4, 6], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Saturn_-_April_25_2016_%2846435379305%29.jpg/1280px-Saturn_-_April_25_2016_%2846435379305%29.jpg", "explanation": ["Imagine dropping a large balloon into a tub of water; it sinks because it's too dense. Now, think about dropping a massive, fluffy object instead.", "Saturn, being less dense than water, would behave like that fluffy object. Its average density is much lower than water's, which is why it wouldn't sink if placed in water."], "example": "A balloon floats because it's filled with air, which is less dense than water.", "whyItMatters": "Saturn's average density is less than water's density, so it would float."}, {"id": "7f4863a54b6d", "title": "Voyager Golden Record", "slug": "voyager-golden-record", "headline": "Voyager 1 is the farthest human-made object from Earth, over 24 billion km away", "summary": "The Voyager 1 spacecraft is the farthest human-made object \u2014 over 24 billion km from Earth", "source": "The Voyager 1 spacecraft is the farthest human-made object \u2014 over 24 billion km from Earth", "sourceUrl": "https://en.wikipedia.org/wiki/Voyager_Golden_Record", "articleUrl": "https://en.wikipedia.org/wiki/Voyager_Golden_Record", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [7, -1, 5, -4, 1, -8, 0, 6, 4, -3, 6, -5, -4, 3, -3, -7, -3, -3, -11, 4, 15, -12, -6, -8, 2, 11, -5, -4, 10, -24, 4, -7, 0, 2, -2, 4, 2, -11, -5, 4, 5, 1, 3, -5, -4, 6, -4, 1, 6, 0, 0, -1, 2, 4, 6, -3, 2, -1, 3, -5, 0, -5, -15, 6, 1, 3, 2, -9, -4, -4, 3, 3, -1, 8, 1, 1, 3, -6, 4, 0, 8, 4, -9, 0, -1, -1, -2, 9, 2, 6, -7, -3, 6, 7, -10, -7, 2, -2, 13, 46, -2, 10, 7, 2, 8, 8, 1, -5, 6, 3, 1, -1, -5, -1, -2, -5, 9, 0, -2, -1, -4, 2, 8, 0, -5, 2, 9, 4, -1, 1, 10, -4, 0, 1, 5, -3, 3, 0, 1, -3, -2, -9, 1, 0, -7, -1, -2, -4, -5, -2, 5, 5, -1, -8, 4, 4, 5, 7, -8, -2, 9, 5, -5, 7, 4, -16, -2, 13, 10, 7, 3, -2, -2, 4, 5, 2, -9, 5, 2, 6, -3, -4, -3, 0, 6, -4, -5, 3, -2, -2, 10, 5, 5, 4, -2, 1, 2, -1, -2, -6, 2, -2, 0, 4, -1, -6, 8, -2, 1, 3, -8, -10, -1, -5, 1, -5, 0, 2, 6, -4, -2, -5, -7, -35, -5, -9, -2, 3, 7, 5, 1, 5, -7, 7, -7, -4, 3, -7, 1, 1, 12, -1, -7, 0, -1, -7, 0, -5, -6, 21, -3, 7, -4, -3, -1, -2, -6, -2, -5, 2, -2, -6, -2, -13, 0, 0, 1, 5, -1, 0, -7, 5, 5, 7, -3, -3, -2, -3, -4, -6, -1, -4, 10, -3, -1, -3, 4, -5, 1, 3, -3, 13, -13, -1, 14, -1, 2, 9, -10, 7, 8, 6, 8, 4, 6, 1, -3, 4, 4, 6, -4, -8, -7, 9, 1, -4, -7, 0, -2, -27, 5, 3, 4, 0, 3, 2, 6, -3, -5, -2, 2, 3, 9, 5, 4, 2, 0, 0, -2, 1, 1, 10, 5, 3, 3, -6, 7, -3, -8, -2, 2, -2, -1, -7, 5, 7, 3, 5, -5, 4, -2, 7, -5, 17, -6, -2, -10, -1, -6, -10, -9, 0, -1, -10, 2, 3, 0, -1, -7, -3, 0, -6, -2, 3], "explanation": ["Voyager 1 will pass within 1.6 light-years of the star Gliese 445 in about 40,000 years. This fact highlights the vast distances involved in space exploration and the enduring legacy of the Voyager mission. It underscores the spacecraft's journey as a significant milestone in humanity's quest to explore the cosmos."], "whyItMatters": "Understanding Voyager 1's distance and purpose helps us appreciate the scale of human space exploration and the enduring quest for knowledge and connection beyond Earth.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/The_Sounds_of_Earth_-_GPN-2000-001976.jpg/1280px-The_Sounds_of_Earth_-_GPN-2000-001976.jpg"}, {"id": "04aa2d438e78", "title": "Earth", "slug": "earth", "headline": "Light from the Sun takes 8 minutes and 20 seconds to reach Earth", "summary": "Light from the Sun takes 8 minutes and 20 seconds to reach Earth", "source": "Light from the Sun takes 8 minutes and 20 seconds to reach Earth", "sourceUrl": "https://en.wikipedia.org/wiki/Earth", "articleUrl": "https://en.wikipedia.org/wiki/Earth", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -1, 2, -4, 7, 2, 4, -5, 5, 5, 7, -2, 0, 4, -4, -3, -2, -9, -7, -1, 15, -8, -4, -3, 9, 5, -2, -3, -7, -17, -7, -5, -1, -7, -7, 0, -5, -10, -4, 2, 12, 4, 2, -2, -4, 9, -9, -3, 10, 1, -9, 5, 1, 2, -1, 9, 2, 4, 9, -7, -8, 3, -18, 2, 4, -3, 2, -2, 1, 1, 2, 6, -4, -2, -5, 4, -2, -7, 4, -10, -3, 10, -4, 3, 6, 8, -4, 3, 1, 12, 0, -2, -8, 6, -6, -7, 4, -3, 9, 37, -5, 13, 9, 0, 6, 1, 0, 1, -2, 5, -2, -5, -1, -5, 2, 3, 5, -2, -6, 3, -6, 2, 13, -2, 4, 5, 10, 3, 6, 7, 8, -6, -1, -7, -3, 6, 5, -6, 0, -5, 4, -13, 4, -8, -4, 5, 1, 0, -2, -5, 5, 6, 2, -2, -4, -1, 4, 6, 3, -4, -1, 5, 0, 0, 9, -6, 1, 6, 2, 3, 6, 12, 5, -2, 16, 5, -5, 5, 4, 2, 5, -5, 1, 2, 5, -3, -9, 11, -2, -3, 1, -4, -4, 4, -9, -5, 2, -10, 2, -6, 10, -6, -4, 3, 1, -6, 10, 2, 1, 1, -4, -7, 0, -6, -6, -2, 4, 2, -2, 3, -2, -17, -5, -33, -2, -4, -1, 12, 1, 1, -6, 7, 1, 10, -10, 4, -11, -5, 0, 1, 7, 6, -5, -7, 1, -9, -5, -1, -2, 16, -3, -3, -10, 0, 2, 3, -12, -1, 1, 9, 0, 2, 1, 1, 6, -3, 5, 0, 7, 5, 7, 6, 0, 4, -6, 2, -2, -1, -6, -9, 5, -6, 4, -5, 6, 4, -2, -6, 3, -3, -7, 2, -2, 0, 6, -12, 1, 5, 1, 1, 3, 6, 2, 8, -4, 0, 4, -3, -4, 8, -4, -8, -3, 2, -4, -3, -6, 4, -2, -33, 2, 3, -3, 5, 0, 8, 4, -3, -4, -11, -2, 1, 7, 5, 2, 0, 6, -9, -1, 4, 1, 16, -3, 0, 8, 1, 4, 12, -3, 1, 9, 1, 2, 1, -5, 0, 1, -5, -6, 8, 2, 4, -3, 9, -13, -8, -12, -7, 1, -3, -5, 6, 8, -6, 6, -4, 2, -5, -1, 6, -8, 2, -7, 5], "explanation": ["Light travels at a constant speed of approximately 299,792 kilometers per second (186,282 miles per second). This speed allows light to cover the vast distance between the Sun and Earth in just over 8 minutes and 20 seconds.", "The Sun is approximately 93 million miles (150 million kilometers) away from Earth. Given the speed of light, this distance translates to a travel time of 8 minutes and 20 seconds for light to reach our planet.", "Understanding this fact helps us appreciate the vastness of space and the relatively short distance light travels in just a few minutes, highlighting the incredible speed at which light moves compared to our everyday experiences."], "whyItMatters": "This fact underscores the immense distances in space and the incredible speed at which light travels, providing a perspective on the vastness of the universe.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Meteosat-12-fci-march-equinox-2025-noon.jpg/1280px-Meteosat-12-fci-march-equinox-2025-noon.jpg"}, {"id": "e76e000286cf", "title": "Chemistry: A Volatile History", "slug": "chemistry-a-volatile-history", "headline": "52! \u2248 8 \u00d7 10^67 possible arrangements of a deck of cards", "summary": "There are more possible arrangements of a deck of cards than atoms on Earth \u2014 52! \u2248 8 \u00d7 10^67", "source": "There are more possible arrangements of a deck of cards than atoms on Earth \u2014 52! \u2248 8 \u00d7 10^67", "sourceUrl": "https://en.wikipedia.org/wiki/Chemistry:_A_Volatile_History", "articleUrl": "https://en.wikipedia.org/wiki/Chemistry:_A_Volatile_History", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -3, -3, 3, 1, -1, -5, 0, 6, -2, -2, 0, 2, 0, 3, -3, -3, 1, -9, 2, 8, -4, -4, -6, -1, 12, -7, -8, 0, -19, -3, 8, 6, -2, 2, 1, -4, 5, -9, -3, 5, 0, 3, 0, 0, 2, -4, -1, -1, -4, -5, 1, -1, 1, 7, 0, 3, 7, 0, 2, 3, 1, -13, 2, 3, -5, -2, 0, 5, 8, 7, 6, 3, 1, 3, -1, -5, -5, 0, -3, -6, -3, -2, 1, -3, -6, -3, 3, -7, 0, -2, 4, 1, -2, -1, -2, 4, 1, 1, 51, 5, 6, 5, -1, -4, -1, -5, -7, -3, -6, -2, -9, 4, -4, 1, 7, 7, 0, 3, 4, -5, 8, 3, 1, -3, -4, -10, 7, 4, 11, 2, -3, 7, -6, 1, -3, 5, 5, 9, 3, -1, -4, 1, -6, -3, 11, -1, 0, 0, 0, 5, 3, 3, -2, -1, -7, -1, 5, -9, 4, 4, 8, 3, 14, 3, -4, -4, -5, 2, -10, 2, 5, 1, 13, 14, -4, -5, 3, 6, 7, 4, 5, -1, 7, 1, -1, -5, 2, 1, -1, -2, 5, -7, 9, -12, -9, 1, -2, 0, 1, 1, -3, -4, 7, -1, -5, 7, -8, -3, 1, -4, -3, 2, 2, 1, 1, 2, 0, 1, -2, -2, -17, -1, -42, -2, -5, -6, 0, -2, 1, -5, -3, 5, -10, -9, 4, 1, -4, -1, -5, -2, -3, 12, -5, 7, -3, -4, 5, 1, 19, 3, -9, 0, 3, 5, -5, 4, 4, 2, -1, -6, 4, -6, -4, 9, 4, -3, -2, -2, -9, -2, 4, 1, 1, -6, -5, -2, 6, -1, -8, 2, 1, 11, -3, 1, 3, 7, 1, 1, -4, 0, 0, -4, 1, 1, 2, -5, 10, -2, 5, 9, 3, -2, 2, -1, 3, 0, 0, 2, 1, 0, 1, -2, 2, 8, -4, 6, 1, 1, -40, 2, 4, 4, -5, 1, 1, 10, -6, -9, 0, 4, 5, -5, -5, -5, 4, -6, 0, 1, 6, 6, 27, -3, -5, -2, 4, -1, -3, 3, -9, 0, 4, -8, 4, 6, 3, -3, 2, -8, -7, -3, -9, 1, 6, -3, -2, 1, 6, -1, -1, -2, 1, -1, 0, 1, -4, -6, -1, -1, 2, -4, 5, 10, 4], "explanation": ["The factorial notation (52!) represents the total number of ways to arrange 52 unique cards. This number is astronomically large, approximately 8 \u00d7 10^67. This immense figure highlights the vastness of possible combinations even within a relatively small set."], "example": "Imagine arranging just 52 playing cards; the number of possible sequences is around 8 \u00d7 10^67. This is far greater than the estimated number of atoms on Earth, which is around 10^24.", "whyItMatters": "Understanding this vast number helps appreciate the complexity and diversity of arrangements in seemingly simple systems.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Great_Pyramid_of_Giza_-_Pyramid_of_Khufu.jpg/1280px-Great_Pyramid_of_Giza_-_Pyramid_of_Khufu.jpg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "Douwe C. van der Zee"}, {"id": "31d338314077", "title": "Software bug", "slug": "software-bug", "headline": "Did a moth really cause a computer crash?", "summary": "The first computer bug was an actual bug \u2014 a moth found in a Harvard Mark II relay in 1947", "source": "The first computer bug was an actual bug \u2014 a moth found in a Harvard Mark II relay in 1947", "sourceUrl": "https://en.wikipedia.org/wiki/Software_bug", "articleUrl": "https://en.wikipedia.org/wiki/Software_bug", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-9, 2, 5, -3, -2, -7, 5, 7, 2, -4, 9, 5, 2, 3, 0, 7, -5, -2, 6, 5, 4, -7, 2, -4, -7, 7, -10, -2, -1, -20, -6, -2, 2, 0, 7, -3, 2, -5, 1, -1, 0, -1, -1, 0, 6, -9, -1, -3, 5, -10, -7, 2, 6, 1, 2, -5, 5, 8, 5, 2, -2, -1, -14, 9, 10, 1, -4, -13, 4, 3, -9, 2, -1, 6, 7, 5, -1, -3, 3, 0, -3, -7, -2, 0, -3, 0, -2, 6, 6, -2, -2, 0, 2, -3, -2, 1, 3, -2, 2, 47, -3, -2, 5, 2, 1, -5, 4, -5, 0, 1, 12, 4, 14, 5, 6, -6, 1, -3, 6, -6, -1, 8, 12, -5, 0, 0, 5, 16, 3, -4, 4, -2, 10, -4, 4, 0, -1, -1, -1, -2, -9, -3, 7, 0, -11, -5, 1, -2, -4, 1, 5, -8, 0, -3, 0, 2, 10, 13, 1, -2, -2, -2, 0, 7, 4, -8, 0, 5, -2, -3, 5, 1, 1, -2, -6, -1, -2, 2, -6, 3, -1, -6, -7, 3, 3, -5, -7, 1, 3, -1, -10, -1, 2, 1, 2, -3, -5, 0, -3, -6, 6, -6, -4, 2, -3, -2, 3, -7, 9, -7, 4, -6, -4, 0, -6, 4, -2, -1, 11, 5, -1, -1, -8, -36, -12, -5, 1, -11, -1, 0, -5, 7, -5, 8, 7, -1, -3, -3, -1, 8, 2, -6, 0, -4, -1, -1, -7, -5, -11, 20, 9, 4, -4, 2, 3, -1, -1, 4, 2, 3, 1, -3, -2, -9, 1, 1, -6, 4, -4, 1, -11, 4, 2, -2, 3, -3, 4, -1, -7, -6, 2, 3, 4, 6, -1, -6, -1, 9, 5, 2, -7, 8, -5, -1, 22, 4, -14, 1, -7, 14, -1, 0, -3, 4, -6, 3, 5, -5, 5, 3, -6, 6, -5, 6, -6, -1, -1, 1, 9, -28, 7, 5, 3, -3, 1, 4, 0, 2, -5, -4, -3, 0, -4, 6, 7, 1, -4, -7, -4, -5, 4, 23, 1, -3, -4, 1, 10, -1, 2, 3, -8, 6, -6, -3, 4, 1, 2, 0, 3, -8, 7, 3, -4, 13, 10, -5, -3, 1, 2, -9, -1, -2, 3, -3, 0, -9, 3, -9, -6, 5, 10, 4, 8, 9], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/b/bd/Codebeispiel_-_Syntax_error.png", "explanation": ["Imagine you're working on a computer, and suddenly it freezes, stopping you in your tracks mid-task.", "This happened because a real bug, a moth, got stuck in a computer part, messing up the signals. The technical term for this is a \"software bug.\""], "example": "The moth was so small, it went unnoticed but caused a huge problem by disrupting the computer's electrical signals.", "whyItMatters": "A tiny moth can lead to a significant software bug, causing unexpected computer behavior."}, {"id": "058f86d69705", "title": "Keyboard layout", "slug": "keyboard-layout", "headline": "QWERTY was designed to prevent typewriter jamming", "summary": "QWERTY keyboard layout was designed to prevent typewriter jamming, not for speed", "source": "QWERTY keyboard layout was designed to prevent typewriter jamming, not for speed", "sourceUrl": "https://en.wikipedia.org/wiki/Keyboard_layout", "articleUrl": "https://en.wikipedia.org/wiki/Keyboard_layout", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-11, -3, 0, 1, -10, 5, -6, 1, 1, -4, -3, 8, 7, 1, 5, -2, -1, -6, -2, -3, 8, 2, 1, -4, -6, -1, 3, -3, -3, -27, -3, 8, 7, 3, -5, 4, -3, 3, 3, -3, -1, 6, 2, -5, 6, -14, 0, -8, 1, -3, -9, 1, 2, 5, 4, 4, 4, 6, 3, -5, 2, 1, -13, 7, 2, -2, 1, -5, 0, 6, -4, 0, -3, 10, 3, -1, -4, -7, 0, 1, 0, -4, -8, 8, -8, 1, 2, -4, -1, -7, 1, -8, -2, -2, -3, -2, -3, -2, -4, 46, -1, -5, 3, -3, 6, -4, 4, -9, -8, 0, 7, -4, 6, 9, -3, 7, -6, 9, 3, -1, -5, -3, 0, -1, 7, -2, -6, 10, -1, -6, -2, 1, 5, 6, 1, 4, -5, -1, 7, -7, 1, -2, 6, -4, -2, 11, -6, -6, 3, 1, 7, 2, -4, -11, 2, 9, 3, 5, -3, -5, -6, -5, -7, 5, 0, -8, 0, 1, -9, -3, -2, 0, 1, 4, -2, -1, -1, -3, 3, 5, 5, -2, -5, -3, 5, 1, 4, 2, 1, 9, 6, -4, -2, 2, -6, -4, -1, 2, -2, -8, 1, 5, -11, 2, 1, -2, 2, -6, 8, 5, -5, -3, 4, -2, -2, 0, -3, 10, 5, 3, -6, 0, -14, -42, -1, 0, -6, 6, -4, -3, 4, 4, -2, 6, 1, -2, -4, -6, 9, 7, -3, -4, 0, -1, 9, -7, -6, 3, 0, 14, -5, 11, -1, 5, 5, -3, -15, 4, 15, 4, -4, -4, -4, -9, 3, -2, -15, -3, -3, -5, -8, -9, 5, 3, -1, 5, 11, 4, -7, 0, -4, -1, 4, 9, -2, -1, -4, 4, -4, 0, 4, 7, 0, -2, 9, -2, 2, 7, 2, 5, 6, 0, -4, 3, 3, 8, 0, -5, -6, 5, -4, 7, -1, -4, 2, 3, 1, 6, 1, -30, 1, 1, 4, -1, 1, -2, -3, 0, 8, -6, 9, 1, -1, 2, -5, 12, -1, 8, -4, 3, 2, 21, -2, -3, 0, 7, 2, 0, -4, 0, -9, 10, 6, -2, -1, 1, 2, 1, 2, -3, 9, -9, -3, 12, 3, 2, -4, 2, 5, 4, -3, -3, 6, 3, -3, -3, 4, 5, 9, 5, -10, 5, 5, 5], "explanation": ["Despite the QWERTY layout's association with slower typing, it remains prevalent due to its historical significance and the inertia of established user habits. The layout's design was not intended to optimize typing speed but to prevent mechanical issues with early typewriters."], "whyItMatters": "Understanding the original purpose of the QWERTY layout helps explain its continued use despite not being the most efficient for typing speed.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Qwerty.svg/1280px-Qwerty.svg.png"}, {"id": "7d894b89f5eb", "title": "Bitcoin buried in Newport landfill", "slug": "bitcoin-buried-in-newport-landfill", "headline": "Fredric Baur invented Pringles can; buried in one", "summary": "The inventor of the Pringles can is buried in one \u2014 Fredric Baur, who died in 2008", "source": "The inventor of the Pringles can is buried in one \u2014 Fredric Baur, who died in 2008", "sourceUrl": "https://en.wikipedia.org/wiki/Bitcoin_buried_in_Newport_landfill", "articleUrl": "https://en.wikipedia.org/wiki/Bitcoin_buried_in_Newport_landfill", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 7, 4, -5, -7, 4, 9, 0, -3, -7, -10, -11, -2, 3, -1, -2, -4, 10, 3, -4, 10, -7, -10, -7, -2, -2, 8, -3, -6, -19, 9, -11, -4, 1, -1, 3, -2, 9, 3, 3, 0, 0, -1, 5, 5, 4, 0, 5, 7, -11, 3, 3, 5, -6, -1, -5, 3, 3, -6, 3, 2, -2, -19, 8, 3, -3, -1, -12, -2, 7, 6, 1, 7, -8, 10, -3, 8, 9, -6, 6, 1, -10, -2, 5, -7, -5, 7, -4, -5, 4, -6, 8, -1, 5, -7, -5, -5, 4, -3, 37, -8, 4, -2, 0, 4, 2, -10, -7, -1, 1, 4, -3, 6, 4, 6, 8, -5, -2, -1, -3, 2, -5, 5, 2, -1, 4, 4, 13, -1, 8, 3, -6, 0, -6, 1, -4, -2, -8, 8, -8, -7, -3, -6, -1, 0, -6, -2, -4, 1, 4, -8, 1, 1, 1, 8, -5, 4, 5, 2, 3, -7, 1, -1, 13, 2, -4, -3, 6, 5, -4, 5, 9, -6, -4, 7, 9, -2, -3, 3, -4, 0, -2, 4, 2, -4, -3, 8, -5, 9, 18, 1, 13, 0, 1, 7, -1, 0, 2, -4, -2, -6, -11, -12, -1, -4, 0, -1, 1, 1, 1, 2, 3, -3, -1, 8, -2, -9, -7, 1, 2, -4, -12, -13, -37, -13, 4, -7, 13, 3, 1, 3, -2, 2, 1, -4, 2, 10, -4, 11, -4, 0, 2, -1, 3, 2, 6, -3, 1, -6, 22, 7, -10, -6, -7, 6, 3, -8, 3, 1, 0, 1, -4, 3, -1, 4, 1, 2, -5, 1, 5, -9, 0, 9, 0, -4, 0, 3, -2, -9, 3, -2, -2, 0, 0, -4, -2, -5, 5, -2, -4, 4, 5, -7, -1, 11, 1, -12, 3, 4, 5, -10, 3, -3, 0, 2, 5, 1, -1, 4, -2, -3, -3, 1, -1, 3, -1, 6, 3, 9, -28, 5, 5, -8, 3, 6, -5, 3, 10, -3, 11, -8, 11, 10, 1, 7, -7, -8, -2, -3, 6, 1, 16, -4, 2, 2, -2, 4, -2, 3, 0, 0, 1, -7, 4, 3, -4, 0, 2, 2, -1, -2, -4, 0, 10, 4, -14, 0, -4, -1, 2, -2, 1, -3, -6, 0, 9, 2, 1, -5, 11, 4, -1, 6, 8], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/1/14/Newport_City_Landfill_Site_-_geograph.org.uk_-_471790.jpg"}, {"id": "feedcf4d1b5e", "title": "Nintendo", "slug": "nintendo", "headline": "Nintendo was founded in 1889 as a playing card company", "summary": "Nintendo was founded in 1889 \u2014 originally as a playing card company in Kyoto", "source": "Nintendo was founded in 1889 \u2014 originally as a playing card company in Kyoto", "sourceUrl": "https://en.wikipedia.org/wiki/Nintendo", "articleUrl": "https://en.wikipedia.org/wiki/Nintendo", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-9, 2, 7, 1, -1, 3, 6, 4, -1, 0, -5, 1, 2, 7, -4, 2, -13, -11, -2, -1, 7, -8, 6, -2, 2, 8, -3, 5, 7, -7, -7, 2, 5, 4, -3, -5, 3, -4, -8, 2, -7, 3, 5, -7, 5, -2, -2, 2, -5, -4, 3, 3, 3, -6, 7, 7, 9, -6, -1, 0, -1, -1, -19, 9, -1, 5, -3, -4, -1, 6, 4, 2, -3, -3, -3, 2, 2, 5, 4, 1, 5, -15, -2, 9, 1, 1, -4, -2, 2, 9, -4, 7, -1, -1, -8, -1, 4, 3, 2, 42, 2, -2, -7, 1, 0, 8, -1, 4, -2, -2, -2, 3, 4, 4, 3, -1, -6, 0, 5, 4, 5, 12, -2, 0, -8, 4, 4, 5, 1, -4, -2, 7, 1, 2, -2, 9, -5, -4, 4, 7, -3, -1, 3, -7, -7, -10, -2, 2, -3, 15, 3, 0, -7, 0, -9, -4, 5, 5, 3, -3, -10, 4, 0, 0, 3, -16, -1, 4, -1, -7, -8, 4, -1, 7, 6, -2, 4, 3, -3, 0, 6, -6, -2, -9, 2, -7, -1, -2, -3, 8, -11, 0, -1, 7, 6, 3, -4, -2, 9, -1, 2, -5, 4, 3, -8, 0, 14, -6, 4, -7, -5, 6, 4, 4, 4, -1, 2, 2, -6, 7, 5, -14, -6, -30, 1, -10, 1, 2, 0, -3, -9, -1, 4, 9, 2, -2, 3, -8, -4, 14, -5, 4, -2, -5, -4, -1, -4, 2, -9, 24, 5, -8, -6, 2, -6, -8, -4, 5, 0, 0, -6, 0, 9, -7, 0, 3, 5, 5, 2, -9, 2, 4, 3, 1, -2, 4, 5, -7, 4, -9, 5, 6, 9, -5, 4, -4, 1, -5, 3, -4, 3, 3, 1, -1, 8, -1, -7, 4, 1, 3, -10, 4, -3, -7, -1, 7, 10, 1, -5, 12, -2, 1, -6, -9, -1, -2, -8, -3, -3, -36, -3, 4, -2, 2, 4, 3, 11, 1, 1, 9, -7, 2, -6, -2, 0, 1, 6, 2, -3, 9, 7, 27, 1, -4, -1, 1, 11, 1, 11, -5, 1, 5, 3, 2, 0, 0, 2, -8, 0, -19, 2, -6, 3, -1, 2, -7, -5, 2, -4, -3, -6, 3, -2, 2, -5, -5, -1, -4, -4, 3, 1, 1, 6, 9], "explanation": ["Nintendo's transition from playing cards to video games marked a significant shift in its business strategy. The development of its first arcade games in the 1970s and the release of the Nintendo Entertainment System in the 1980s propelled the company to international fame. This evolution showcases Nintendo's adaptability and its ability to capitalize on emerging technologies and market opportunities."], "whyItMatters": "Understanding Nintendo's humble beginnings as a playing card company highlights the company's remarkable transformation and adaptability in the entertainment industry.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Headquarters_of_Nintendo_Co.%2C_Ltd.jpg/1280px-Headquarters_of_Nintendo_Co.%2C_Ltd.jpg"}, {"id": "b7033cb60a01", "title": "Microwave oven", "slug": "microwave-oven", "headline": "Percy Spencer invented the microwave oven accidentally", "summary": "The microwave oven was invented accidentally \u2014 Percy Spencer noticed a radar melted his chocolate bar", "source": "The microwave oven was invented accidentally \u2014 Percy Spencer noticed a radar melted his chocolate bar", "sourceUrl": "https://en.wikipedia.org/wiki/Microwave_oven", "articleUrl": "https://en.wikipedia.org/wiki/Microwave_oven", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-6, 1, 1, -2, -1, -7, 5, 8, -3, -1, -5, -7, -1, 3, 4, -2, -3, -1, -3, 0, 7, -7, -9, 2, 7, 3, 4, 3, -7, -17, 5, -9, 5, -3, -4, -2, 10, 1, 1, 0, 4, -1, 0, -5, 0, 2, 0, 6, 10, -10, -4, -2, -1, 4, 8, 7, 8, 7, 3, 10, -3, 1, -19, 1, 3, -8, -10, -9, 5, 10, -4, -1, 11, 1, 0, -3, -1, -4, -5, 4, 4, 1, -7, -1, -9, -12, 8, -5, 8, 2, -2, -9, 2, 3, -4, 2, -1, -2, -5, 41, -4, -2, 7, 7, 1, -8, 5, -6, 2, -4, 2, 3, 1, -3, 12, -8, 4, -5, 3, -2, -9, 4, 5, -2, -5, 1, 1, 8, -11, 4, -2, -8, 5, -1, 6, 4, 2, -6, 12, -10, -4, -6, -3, -2, 8, 3, 1, -1, -9, 5, -1, -5, 4, 7, 6, -1, 6, 14, 0, 4, 5, 1, 2, 2, 0, -8, -3, 6, -1, -8, 5, 5, -7, -6, 2, 4, -1, -5, 0, -5, 4, -9, -1, 0, 9, 1, 5, -1, 7, 7, 4, 6, 1, -1, 2, -8, 1, 2, -10, -4, -12, -19, -8, 0, 1, 1, 7, -1, 8, -5, 1, 2, -6, -10, 2, -7, -2, -1, 0, -8, 8, -1, -14, -33, -10, 3, 4, 3, -5, -4, -1, -2, -2, 6, 4, -7, 1, 2, -3, -1, -9, -1, 3, -2, 7, -5, -8, 2, -1, 21, 10, 2, -1, 0, -3, 4, 2, -1, 3, 8, 1, -4, 4, -10, 4, 1, -3, -1, -2, 1, 1, 3, 4, 7, 8, -8, -2, -1, -7, -4, 5, -3, -5, 1, 2, 0, -2, 4, 2, 0, -6, 1, 6, -5, 22, 3, -3, 2, -2, 7, -7, -5, -3, 1, 5, 2, 4, -2, 2, -8, 1, 0, -4, -5, 2, -3, 4, 3, -5, -27, 8, 6, 0, 4, 2, -5, 6, 0, 7, -7, -7, 4, 4, 10, 0, -6, -11, 0, -3, 11, 7, 21, -1, -4, 5, 5, 0, 0, 6, 0, -4, -1, -7, 6, 5, 1, -5, -7, 1, -7, 6, 1, -1, 12, -1, -3, -11, 1, 3, 6, -5, -4, 6, -3, 6, -7, 4, 2, 1, 6, 2, 9, 7, 9], "explanation": ["Raytheon licensed its patents for a home-use microwave oven, which was first sold by Tappan in 1956. However, it was still too large and expensive for general home use. Sharp Corporation introduced the first microwave oven with a turntable between 1964, making it more accessible and convenient for everyday use. This innovation significantly impacted domestic cooking and heating practices."], "whyItMatters": "Understanding the accidental discovery and subsequent development of the microwave oven highlights the importance of innovation and adaptability in technological advancements. Percy Spencer's unique observation and subsequent invention have had a lasting impact on modern cooking and heating methods.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Panasonic_NN-SD69LS_20220410.jpg/1280px-Panasonic_NN-SD69LS_20220410.jpg"}, {"id": "a3572b8eb092", "title": "Harald Bluetooth", "slug": "harald-bluetooth", "headline": "Harald Bluetooth united Danish tribes", "summary": "Bluetooth is named after Harald Bluetooth, a 10th-century Viking king who united Danish tribes", "source": "Bluetooth is named after Harald Bluetooth, a 10th-century Viking king who united Danish tribes", "sourceUrl": "https://en.wikipedia.org/wiki/Harald_Bluetooth", "articleUrl": "https://en.wikipedia.org/wiki/Harald_Bluetooth", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 12, -2, -10, -8, -4, 8, 8, 0, -7, 2, -6, 6, -1, 4, 3, -1, 6, 1, -1, 3, -3, 2, -1, 3, 9, 3, 5, -2, -16, 0, 1, 3, 3, -6, -1, 1, -2, -6, 9, -4, 3, 5, 2, -2, 6, -1, 1, -2, -2, 7, -5, 6, -7, 5, 5, 8, 13, 3, -5, 3, 7, -21, 11, 4, 3, 2, -8, -5, -1, 2, -2, 14, -7, -2, 1, -3, -4, -5, -8, 1, 6, -1, -5, -6, -1, -9, -3, -1, -5, -11, 6, 0, 4, -9, -1, -4, 1, -3, 42, -11, 6, -4, -5, 5, -6, -7, 0, -7, 8, 2, -3, -4, -3, 4, 0, -2, 1, 3, 0, -7, 1, 12, 0, -2, 6, 8, 0, 5, 2, -2, -3, -2, -3, 1, -1, -4, -4, 1, -3, 0, -9, -1, 2, -6, -4, 4, 0, 3, 7, 3, -1, 5, 1, -6, 0, 6, 0, 8, 3, 3, -7, -4, 1, 0, -22, 0, 0, 5, -4, -7, 4, -2, 8, 8, 5, -4, -2, -10, -11, 3, -2, -6, -9, 2, 4, -7, 4, 8, 11, 6, 9, 11, -1, 5, 7, -5, 1, -2, 2, -5, -2, -2, 9, 2, 2, -2, 0, 0, -6, 7, -3, -2, 2, -3, -6, -9, 8, 1, 1, -2, -14, -7, -35, -3, -1, 4, -4, 6, 0, -2, 5, -1, 6, 2, 2, 1, -1, 10, 6, 2, 1, -2, 1, 3, -9, 1, 4, -2, 24, -1, -4, 1, 3, 5, -5, -6, -4, 5, 1, -5, 2, -7, -11, 6, 4, -9, 3, 1, -4, -13, 6, 3, 6, 10, 0, 5, -12, -4, -4, -2, -7, 5, -1, 2, -9, 1, 2, 2, -1, 6, 3, -7, -4, 14, -5, -12, 0, 2, 2, -9, -3, 2, -4, -4, 9, 3, 0, 3, 12, 7, -1, -5, 3, -1, 2, -5, 0, 6, -27, 7, -1, 4, -3, 4, -8, -1, -4, -1, 10, 3, 7, 1, -3, 11, 6, -3, -6, 3, 0, 0, 15, -3, 9, 6, 5, 9, -1, -2, -2, 2, 6, -3, 1, 7, 4, -10, 4, 4, 0, 3, -4, 1, 12, 3, -6, -6, 0, 3, -2, -10, -9, 5, -10, -1, -2, -7, -2, 2, -3, -8, 3, 6, 5], "explanation": ["Harald's rule in Norway was short-lived and fraught with challenges, lasting no more than a few years in the 970s. His son, Swein Forkbeard, eventually deposed him from the Danish throne, highlighting the turbulent nature of Viking politics."], "whyItMatters": "Understanding Harald Bluetooth's unification efforts provides insight into the political landscape of 10th-century Denmark and Norway. His legacy as a unifying figure is a key aspect of his historical significance.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/1200_Harald_Bl%C3%A5tand_anagoria.jpg/1280px-1200_Harald_Bl%C3%A5tand_anagoria.jpg"}, {"id": "8e2faba02463", "title": "Alarm clock", "slug": "alarm-clock", "headline": "Ever wondered how you can wake up at a specific time without setting an alarm every night?", "summary": "The first alarm clock could only ring at 4 AM \u2014 invented by Levi Hutchins in 1787", "source": "The first alarm clock could only ring at 4 AM \u2014 invented by Levi Hutchins in 1787", "sourceUrl": "https://en.wikipedia.org/wiki/Alarm_clock", "articleUrl": "https://en.wikipedia.org/wiki/Alarm_clock", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-2, 0, -3, 4, -5, 0, 5, 0, 5, 1, -4, 8, 2, 2, 2, 2, -1, -3, -6, 0, 12, -6, -2, 3, 6, 0, 7, 4, -2, -15, 0, -1, 4, -3, -1, -4, 5, 5, 3, 4, 1, 3, 6, -2, -4, 1, -1, 5, 5, 0, 4, 0, 5, -8, 7, 8, -4, 4, 8, -1, -4, 7, -19, 9, 0, 5, 1, -10, 3, 4, 1, 3, 4, -5, 0, -2, 1, -4, 6, -1, 5, -3, 0, 1, -5, 9, -6, -7, -4, 3, -11, 2, -1, -7, -6, -7, -5, 4, -9, 35, -4, 5, -6, 6, 2, -4, -2, -10, 2, 2, 5, 1, 13, 0, 11, 3, 3, 0, 9, 6, -4, -1, 4, -8, -7, 1, 3, 11, -9, 2, 2, -6, 11, 3, 3, 2, -5, 0, 9, -9, -6, -9, 0, 5, 4, -6, 2, 5, 2, -2, 4, -13, -10, -5, 7, -1, 8, 10, 2, -2, -11, 1, 1, 0, -1, -14, -1, 5, -5, -14, 3, 11, 1, -1, 12, 4, 6, 6, -1, 0, -1, -16, 6, 0, -3, -3, -1, -2, 6, 6, -5, 6, -4, 1, -15, -5, 0, 6, -3, -1, -6, -8, 7, 4, 6, 8, 8, 3, 10, -1, 10, -4, 3, -8, -7, 1, -9, 6, 2, -4, 6, -5, -6, -34, -5, 5, -6, 12, 1, -3, -5, -8, -4, 1, 1, 1, 9, -1, 10, 1, -3, 1, -6, 1, 2, -9, -11, -9, -5, 18, -3, 1, -2, 7, -10, 10, 6, 4, 2, -2, 6, 0, -4, -11, 0, 3, -3, -11, -3, -4, 1, -1, -5, 6, -6, -7, -5, 1, -8, -4, 2, -1, 9, 5, -3, -2, 7, -4, 7, -11, 0, -1, -7, -3, 18, -5, 3, 5, -5, 5, -8, 0, -3, -3, -1, -3, 3, -7, 2, 2, 1, 2, 9, 7, 6, 7, 1, 6, -2, -22, 2, -8, 4, -5, -1, -11, 11, -5, -3, 0, -6, 0, 8, 5, -1, -1, -6, -8, -4, 2, 14, 17, 2, -3, 2, 6, 4, 0, 6, 1, 0, 8, 1, 2, -6, -1, 2, -3, 1, -13, 3, 4, 0, 13, 3, -4, -10, -1, -7, -8, -12, -1, 10, -1, 2, 0, -2, 5, 3, 1, -6, 5, 2, -3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/2010-07-20_Black_windup_alarm_clock_face.jpg/1280px-2010-07-20_Black_windup_alarm_clock_face.jpg", "explanation": ["Imagine you're a night owl who loves sleeping in, but you have an important meeting at 9 AM. You don't want to set multiple alarms or wake up repeatedly.", "Think of an alarm clock as a personal assistant that knows exactly when you need to wake up for your meeting. It doesn't need to be set up every day; you just tell it once, and it takes care of the rest."], "example": "You set your alarm clock for 6 AM, and it rings just once when it's time to get up for your 9 AM meeting, without bothering you all night.", "whyItMatters": "An alarm clock solves the problem of waking up at a specific time without the hassle of multiple alarms or waking up repeatedly."}, {"id": "35aaf782c0ac", "title": "Bubble Wrap (brand)", "slug": "bubble-wrap-brand", "headline": "Did you know bubble wrap started as wallpaper?", "summary": "Bubble wrap was originally invented as wallpaper \u2014 it failed and found success as packaging", "source": "Bubble wrap was originally invented as wallpaper \u2014 it failed and found success as packaging", "sourceUrl": "https://en.wikipedia.org/wiki/Bubble_Wrap_(brand)", "articleUrl": "https://en.wikipedia.org/wiki/Bubble_Wrap_(brand)", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-3, 2, 9, 2, 4, -3, 4, -1, 0, -4, -4, -1, -1, 3, 0, 5, -1, -2, -3, 4, 4, 0, 0, -4, 1, 9, -4, -4, -1, -17, 3, 0, 0, 2, 6, -1, 3, 6, 1, 4, 1, -4, -7, -2, 6, 2, 4, 4, 10, 0, 7, -2, 0, -3, -11, 4, 4, 0, -4, 3, -4, 1, -13, 11, 2, -1, -8, 4, 0, 6, -2, 4, 2, 5, 5, -3, 6, -4, -6, 0, 2, -3, -2, -2, -12, -6, -2, -3, 2, 0, 1, 5, -5, 2, -11, -9, 1, 1, -3, 40, -9, -7, 7, -6, 0, -4, -5, -4, -2, 1, 6, 5, 1, 0, 2, -8, -10, -8, 2, -7, -3, 9, 6, -6, -15, 2, 2, 4, -4, -6, 4, 3, 1, 0, 5, 4, 2, 0, 3, -5, -1, 4, 8, -1, 0, -1, 0, 6, 2, 3, -4, -3, -12, -1, 0, -7, 11, 13, 2, 3, -1, 4, -9, 3, -8, -18, 2, 2, 6, -4, -3, -1, -4, -6, -4, 5, -9, 0, 7, 2, 8, -10, -2, -5, 2, -14, 1, 3, 9, 7, -3, -1, -6, 7, 1, 2, -2, 0, 2, 3, -7, -3, 0, 7, 4, 8, 7, -7, 6, -6, 0, 3, -2, 2, 2, -3, 3, -2, 8, -3, 2, -12, -12, -32, -6, 4, 3, 3, 2, 8, 1, -2, 1, 12, 0, -1, 1, 4, -8, 7, 1, 3, -8, -6, -5, 9, 2, 6, -2, 25, 10, -3, 12, 8, 0, -7, -4, -2, 5, 4, -2, -9, -5, -5, -7, -4, -13, -2, 1, 2, 1, -1, 3, -4, -2, 1, 3, -4, 0, 1, 0, 2, 0, -9, -2, 5, 5, -3, 6, 3, -1, -6, 2, -4, 20, -7, -13, 7, 0, 6, -7, 4, -5, 1, 2, 5, -5, 7, 2, -6, -8, 0, -8, 3, 1, -2, 4, 11, -6, -33, 0, 7, 7, -6, 2, 7, 9, 2, 4, -7, -11, 2, -2, 3, -8, 2, 2, 6, 2, 1, 3, 18, -7, -7, 1, 9, 0, 6, 12, 3, 5, -2, 0, 1, -7, -2, 8, -6, -8, 4, -4, -4, -3, 5, -2, 4, -4, 1, 0, 0, -1, -3, -1, -4, 0, -8, 3, 0, 12, 4, -2, 7, 11, 15], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/5/5b/Mainz_Gutenbergdenkmal_2016_%28cropped%29.jpg", "imageLicense": "CC BY-SA 4.0", "imageArtist": "Kenneth C. Zirkel", "explanation": ["Imagine you're trying to move a heavy vase from one room to another without breaking it. You need something soft and protective.", "Bubble wrap, originally called Air Cap, was created to cushion fragile items. It turned out to be perfect for protecting delicate objects during transport."], "example": "You wrap the vase in bubble wrap and move it safely without any damage.", "whyItMatters": "Bubble wrap's cushioning ability makes it ideal for protecting fragile items during transport."}, {"id": "3abcc3cc0487", "title": "Fax", "slug": "fax", "headline": "Did you know fax machines were invented 33 years before the telephone?", "summary": "The fax machine was invented in 1843 \u2014 33 years before the telephone", "source": "The fax machine was invented in 1843 \u2014 33 years before the telephone", "sourceUrl": "https://en.wikipedia.org/wiki/Fax", "articleUrl": "https://en.wikipedia.org/wiki/Fax", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-5, -4, 2, 2, -2, 2, -1, 4, -2, -2, -1, 0, 2, -2, -3, -2, -2, -10, -1, 4, 12, -8, -11, -4, 1, 9, -1, -2, -3, -13, 6, 7, 7, -3, 2, -10, -3, -2, -4, 2, -4, 0, 0, 0, -2, -6, 0, 3, 7, -6, 2, -3, 7, -2, 8, 5, 4, -6, 1, -1, 1, -2, -22, 15, -3, -1, -3, -12, -1, 4, -9, 7, -8, 0, 1, 2, 6, 0, 3, 1, 9, -9, 8, -2, -12, -8, 9, -4, -1, -4, -8, 5, -2, 4, -6, -3, -2, 10, 2, 37, -11, 1, 0, -2, 0, 2, -3, -1, 4, -1, 0, 5, 10, 10, -3, 0, -7, 2, 11, -3, -5, -2, 0, -7, -6, -4, 6, 11, -13, -6, 0, -6, 4, 5, 4, 2, -2, -3, 1, -3, -2, -10, -5, 3, -10, 1, 0, 0, 1, -7, 5, -2, 0, -3, 3, -4, 17, 13, -2, 3, -4, 7, -5, 13, 1, -23, -6, 6, 7, -8, 9, -1, -3, 4, -5, -1, -2, 2, -4, -6, 2, -2, 10, -10, -1, -1, 2, 3, 3, 12, 4, 6, 1, 8, -4, -3, -5, 7, -1, -9, -4, -4, 6, 4, -5, 0, 6, -5, 12, 1, 1, 1, 10, -8, 0, 6, -1, -6, 8, -3, 0, -1, -7, -32, 0, -2, 1, 8, 5, -1, -3, 3, 1, 3, 6, -1, -1, -8, 13, 4, -1, -1, 2, -7, 6, 1, 2, 3, -1, 20, -3, 0, 1, 8, -6, -6, -2, -6, 1, 4, 2, 5, -4, -17, -1, 1, -2, -5, -7, -3, -7, 0, 5, 5, 0, -4, 8, -10, -11, -6, 4, -5, 6, 9, -6, -5, -2, 3, 0, -10, 10, -1, -3, 0, 21, 2, -8, 3, 0, 5, 1, 1, -3, 4, 4, 2, 4, -7, -3, 0, 7, -1, 0, 4, 0, -1, 3, 8, -5, -27, 2, 10, 3, 1, 7, 6, 2, 5, 4, 0, -3, 6, -7, 2, -1, 2, -1, -11, -1, 4, 6, 15, -10, 3, 5, 4, 1, 3, -1, 5, 0, 0, -1, 0, -8, 1, 7, -5, -1, -15, 2, -2, 1, 10, 2, -3, -12, 2, 3, -2, -2, 0, 12, 6, -8, -5, -2, -1, 3, 2, 2, 5, 7, 8], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/f/f5/Samsung_SF-3100_Inkjet_Fax_Machine.jpg", "explanation": ["Imagine you're working in an office in the 1980s, and you need to send a signed document to a colleague in another building. You can't just walk over to their desk; it's too far and inconvenient.", "The fax machine lets you scan a document and send it over the phone to another fax machine that prints it out. This way, you can share important documents quickly without needing to physically deliver them."], "example": "You scan a signed contract and send it via fax to your colleague's office. They receive it and print it out almost instantly.", "whyItMatters": "The fax machine revolutionized quick document sharing by converting printed material into audio tones for phone transmission."}, {"id": "c2e1988b043b", "title": "Velcro was inspired by burrs sticking to a dog's fur", "slug": "velcro-was-inspired-by-burrs-sticking-to-a-dog-s-fur", "headline": "How can you easily remove your clothes without zippers or buttons?", "summary": "Velcro was inspired by burrs sticking to a dog's fur \u2014 invented by George de Mestral in 1941", "source": "Velcro was inspired by burrs sticking to a dog's fur \u2014 invented by George de Mestral in 1941", "sourceUrl": "https://en.wikipedia.org/wiki/Velcro", "articleUrl": "https://en.wikipedia.org/wiki/Velcro", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-11, 5, 11, -3, -3, -2, 6, 0, -5, 2, -4, 2, 3, 2, 1, -1, 4, 16, -13, 2, 6, -6, -10, 4, 1, -1, 1, 5, -4, -10, 4, 0, 1, 1, 0, -1, -6, 4, 0, 2, -1, 7, -3, -1, 4, 0, 1, 3, 3, 8, 7, 6, -2, -6, 10, 2, 0, 0, 0, -6, 4, 3, -13, 14, 4, 3, -3, -1, 3, 8, 1, 8, 1, 7, -5, 5, 4, 0, -2, -2, 0, 0, 4, 0, -12, 0, -1, -14, 1, 0, -12, -3, 1, -3, -3, -3, -9, 8, -3, 40, -7, 5, 1, -3, 6, -1, 3, 4, -5, 4, 5, 6, 7, 3, 1, 4, -4, 6, 5, 6, -9, 3, 3, -6, -3, 2, -4, 8, -5, -1, -3, -1, 6, -2, 6, -2, 0, 5, 7, -3, -6, 0, 5, 0, 5, -11, 0, -3, -7, 1, -2, -4, -7, 2, 7, 0, 3, 7, -1, 5, -4, 3, -5, 7, -5, -18, -3, 2, 2, -2, 0, 12, -11, 5, 5, 6, -6, 1, 4, 4, 0, -14, -5, 0, -6, 4, -3, 3, 2, 13, -2, 1, 2, -4, 1, -4, -5, -4, -13, 2, 2, -9, 0, 2, 2, 4, 11, -11, 4, 3, 11, 3, 0, -6, 3, 0, -9, -1, 4, -7, 5, -10, -8, -38, 3, -3, -2, 6, -4, 5, -10, -6, -6, 12, -4, -4, 3, -1, 3, 8, -8, -8, -5, -1, -1, 0, 1, -4, 0, 21, 8, 0, 1, 8, 2, -2, -8, 0, 8, 3, -7, 7, -2, -7, 0, 1, -3, -2, 3, -7, -4, -7, -2, -2, -4, 1, -5, -12, -5, -3, -7, 0, 0, 1, -7, 5, -2, -4, 5, -1, 1, 2, -11, -4, 20, 7, -8, 1, 2, 0, 5, 3, -12, 8, 6, -1, -1, 3, -2, 3, -9, 7, 4, 4, 2, 1, 4, -1, -4, -30, 3, 5, 1, 0, 10, 3, -5, 10, -9, 3, -1, 3, 0, 12, -7, 1, -3, -6, 3, 4, -5, 18, -6, 3, 7, -4, -2, 4, 4, 7, -2, 3, -2, -7, -2, -7, 7, 6, -4, -10, 5, 11, -5, 11, -3, 1, 0, 2, -2, 0, 2, -2, 6, -1, 0, -5, -1, -3, -3, -1, -12, -3, 2, 10], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Samuel_Morse_portrait.jpg/1280px-Samuel_Morse_portrait.jpg", "imageLicense": "Public domain", "imageArtist": "Mathew Benjamin Brady", "explanation": ["Imagine trying to undress quickly after a long day without struggling with fasteners that stick or are hard to remove.", "Velcro is a simple solution that lets you easily snap your clothes on and off. It's like having tiny hooks on one side and soft loops on the other."], "example": "You put on your jacket, and the hooks on the inside catch the loops on the outside, making it easy to take off when you're done.", "whyItMatters": "Velcro's hook-and-loop design makes dressing and undressing quick and effortless."}, {"id": "0241be59ed6d", "title": "Newton's laws of motion", "slug": "newton-s-laws-of-motion", "headline": "Isaac Newton's Principia introduced three laws of motion and universal gravitation", "summary": "Isaac Newton's Principia (1687) introduced three laws of motion and universal gravitation", "source": "Isaac Newton's Principia (1687) introduced three laws of motion and universal gravitation", "sourceUrl": "https://en.wikipedia.org/wiki/Newton%27s_laws_of_motion", "articleUrl": "https://en.wikipedia.org/wiki/Newton%27s_laws_of_motion", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 0, 0, 0, -12, -3, 1, 4, -2, 2, -4, -9, -14, 1, -5, -9, -5, 5, -9, 3, 17, -5, -7, -1, 5, 12, -3, -5, -1, -22, -1, -6, 8, -1, -2, 6, -2, 5, -7, 4, -5, 7, 4, 8, 8, 3, 6, 7, -2, -2, -6, 1, 0, 1, -6, 3, 0, 2, 0, 0, 5, 7, -26, 7, 12, 2, -2, -8, 2, 6, -5, 9, 8, 3, 0, -4, 4, -2, -1, 1, 6, -3, -9, 1, -7, -3, 3, -8, 5, 3, -5, -2, -11, 2, -4, -7, -2, 0, 6, 41, 1, 4, 1, 3, 4, 3, -4, -16, 2, 3, 9, -2, 8, -5, 3, -4, -3, -3, 3, -3, -1, 2, 5, -8, -4, -4, -5, 12, 3, -4, 7, 1, -2, -4, 7, 4, 7, -2, 3, -6, -2, -8, -2, -4, -4, 1, 3, 4, 2, 5, -6, -3, -1, 0, 1, -1, 13, 6, -2, 1, -11, 2, 0, 12, 9, -5, 11, 0, -3, 5, 3, 5, -4, -5, 13, 3, 6, 6, 4, 0, 2, -12, 0, 0, -2, 2, -6, 1, 2, 10, 1, 6, -4, 4, -7, 2, 2, 2, -7, 3, -13, -7, 4, 1, -4, -4, 3, -4, 1, 6, -2, 3, -6, -7, 0, 5, -7, -1, -7, 4, 2, -11, -8, -35, -13, 0, -9, 12, -5, -2, -3, -7, -5, 9, 1, -1, 4, -2, 1, -2, 2, -5, 1, 1, 6, -6, 2, 3, 1, 13, 4, 4, 6, 4, -6, 3, -1, 3, 6, 1, 8, 0, -5, 1, 0, 2, 12, -3, -3, 5, 1, 11, 1, 2, -2, -1, 1, -2, 0, -1, -2, -6, 11, -4, 1, -2, -1, -5, 3, -6, -5, 0, -1, 3, 10, 2, -14, 6, -4, 8, 4, -2, -5, 2, 2, 0, 7, -6, -8, 9, -6, -6, -6, -4, 4, -9, 4, 13, 1, -31, 0, -1, -1, 1, 3, 8, -4, -2, -3, -3, -2, 2, 2, -1, -1, 6, 1, -3, -7, 5, 10, 17, -1, -6, 5, -1, 9, -3, 6, -6, 5, -2, -4, 3, 12, 2, -1, 3, 0, -5, -2, 2, -1, 5, 3, -7, -2, -5, 4, -3, -4, -2, 2, 5, -2, -2, 6, 0, -7, -1, -3, 5, 1, 6], "explanation": ["Isaac Newton's Principia, published in 1687, laid the foundation for classical mechanics with three fundamental laws of motion and the law of universal gravitation. These laws describe the relationship between motion and forces, providing a systematic framework for understanding physical phenomena. Newton's work revolutionized science by offering a unified explanation for both terrestrial and celestial motion."], "example": "Newton's First Law, also known as the law of inertia, states that a body remains at rest or in uniform motion unless acted upon by a force. For instance, a ball on a flat surface will remain stationary until a force, such as a kick, causes it to move.", "whyItMatters": "Newton's laws are essential for understanding motion and forces, forming the basis for much of classical physics and engineering. They enable scientists and engineers to predict and analyze the behavior of objects under various conditions.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Orville_Wright_1905-crop.jpg/1280px-Orville_Wright_1905-crop.jpg", "imageLicense": "Public domain", "imageArtist": "Orville Wright and Wilbur Wright (credited as photographers) [1], [2]"}, {"id": "8eb9614da7ee", "title": "Marie Curie", "slug": "marie-curie", "headline": "Marie Curie won two Nobel Prizes in different sciences", "summary": "Marie Curie won two Nobel Prizes in different sciences \u2014 physics in 1903, chemistry in 1911 for isolating polonium and radium", "source": "Marie Curie won two Nobel Prizes in different sciences \u2014 physics in 1903, chemistry in 1911 for isolating polonium and radium", "sourceUrl": "https://en.wikipedia.org/wiki/Marie_Curie", "articleUrl": "https://en.wikipedia.org/wiki/Marie_Curie", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [2, 6, -5, 3, 1, -2, 2, -4, -3, -7, 5, -7, 4, 1, 0, 5, -8, -1, -6, 5, 0, -3, -1, -6, 12, 0, -9, -7, -2, -21, -1, -9, -7, -11, 5, -3, 1, 1, -1, -1, 7, -2, -2, -5, 4, -2, -2, 5, 5, -6, 2, 4, -4, 5, 4, 8, -2, 5, -1, -3, -3, 7, -22, 0, 9, -4, -4, -7, 6, 5, 5, 0, -1, 0, 2, 3, -7, -5, -2, 4, 5, -5, -3, 2, 1, -7, 0, 1, -4, -1, -7, -3, 0, 8, -5, 0, 11, 3, 12, 34, -6, 5, -8, -7, 7, 0, -5, -9, -6, 4, 9, 2, 10, -9, 7, 5, 0, -3, 5, -7, -3, 2, 4, -9, -6, 4, 9, 5, -2, 0, 2, 0, 4, -3, 4, 13, 1, 0, 10, 4, 0, 0, -7, -4, -5, -1, 0, 3, 11, -3, -3, 7, -1, -2, 1, 4, 2, 8, 2, -1, 0, 0, -2, 15, 9, -5, -5, 8, 4, -8, 5, 5, 0, -2, 5, -12, 2, 0, 2, -5, -5, -2, -1, 7, -4, -4, 1, -3, 3, 11, 1, 13, 3, 10, 0, -3, -2, -4, -8, -2, -1, -9, -9, 9, -6, -4, 6, 0, 8, 7, 0, 2, -5, -8, -6, -4, 0, 2, 9, -3, 12, -9, -14, -33, -9, -1, 0, 11, 7, -1, -8, -3, 1, 0, 14, -4, -6, -2, -7, 6, 4, -2, -7, 1, 2, 0, 11, -3, -3, 13, 7, -12, -7, -3, 5, 5, -1, -9, -4, 0, 5, -9, 3, 4, -4, 1, 7, 1, 2, 5, 1, 9, 3, -1, 9, -10, -3, -3, 14, -13, 3, 0, 3, 0, -5, -2, 2, 3, -1, -3, 1, 4, -7, 3, 13, 1, -9, 0, 3, -1, 7, -1, 7, -2, 2, -4, 5, 1, -2, 3, -7, 1, -2, -2, 1, -4, 2, -3, 11, -35, 1, 8, -3, 0, 1, -6, -3, -2, -2, 4, 3, 5, 7, -5, 7, -1, -1, -8, 0, 7, 4, 23, 7, -3, 3, 5, 0, 0, 0, 1, 1, 1, -6, 4, 13, -8, 9, 0, 0, -9, 1, -3, -3, 10, -3, -1, -15, -3, -3, -2, 5, -2, -1, -1, -10, -3, -3, 1, 1, -1, 4, -4, 5, 2], "explanation": ["Marie Curie's legacy extends beyond her scientific accomplishments; she broke barriers as the first woman to win a Nobel Prize and the first person to win Nobel Prizes in two different sciences. Her groundbreaking work continues to inspire scientists and researchers worldwide."], "whyItMatters": "Marie Curie's dual Nobel Prizes highlight her exceptional contributions to science and her pioneering role as a female scientist in a male-dominated field.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Marie_Curie_c._1920s.jpg/1280px-Marie_Curie_c._1920s.jpg"}, {"id": "5197c0d35e15", "title": "Othniel Charles Marsh", "slug": "othniel-charles-marsh", "headline": "Did you know Charles Darwin spent over 20 years gathering evidence before publishing his groundbreaking work?", "summary": "Charles Darwin spent over 20 years gathering evidence before publishing On the Origin of Species in 1859", "source": "Charles Darwin spent over 20 years gathering evidence before publishing On the Origin of Species in 1859", "sourceUrl": "https://en.wikipedia.org/wiki/Othniel_Charles_Marsh", "articleUrl": "https://en.wikipedia.org/wiki/Othniel_Charles_Marsh", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [0, 9, 4, 2, 0, 3, -5, 4, -3, 0, 6, -6, 0, 4, -17, 7, -4, -10, -1, 0, 9, 7, 5, -2, 3, 5, 2, -2, 4, -18, 3, -10, -1, 4, 7, 2, -1, -4, 2, 11, 7, 13, 2, 2, 2, 7, -4, -2, -4, 1, -8, -1, 5, -2, -3, 7, 4, -3, 0, -3, 1, 0, -25, 8, 6, 2, -12, -9, 3, 4, -4, 0, 3, -5, 5, -3, -6, 3, 7, -12, 3, -1, 5, 0, -6, -4, 1, 1, 1, 5, 13, -8, -1, 2, -8, -1, 0, 3, 7, 37, -8, 8, -2, 10, -2, -1, -8, -3, 4, 4, 2, -1, 0, -4, 5, 0, -5, -4, -5, 2, -6, 1, -6, -4, -2, 5, 6, 7, -3, -9, 5, 4, 3, 1, 2, 8, 2, 3, 6, 6, -7, -6, -6, 4, -9, 2, 4, -1, -2, -6, -3, -1, 2, 2, 0, -6, 10, 4, -1, -1, -9, 4, -3, 7, 9, -13, 5, 4, 6, 2, 1, -4, 2, 2, -4, 2, 1, 2, 1, 0, 14, -5, -11, 8, -2, -2, -2, 9, 2, 7, 3, 0, 5, 4, -9, -7, -3, -1, -3, -4, -11, -14, -1, 0, 2, 2, 10, -1, 16, -3, -6, 0, -4, -6, -2, 2, 2, -2, 6, 3, -7, -18, -2, -36, -11, -4, 1, 6, -1, 5, 0, -3, 4, -5, 5, 5, 2, -11, -5, 8, -5, -5, 7, -10, 0, -9, -6, -3, -7, 15, 2, -11, 1, -1, -6, 2, -9, -6, 1, 0, -1, 4, 2, 1, -2, 0, 6, -11, 2, -2, 5, 3, -5, 11, 10, 3, 8, -14, -2, -12, 4, 0, 7, -2, -2, 2, -6, -2, -1, -3, -2, 7, 0, 4, 14, -1, -8, 1, 4, 6, -9, 1, 2, 4, -1, 3, 7, -1, 4, 0, -2, -7, -3, -1, 1, -6, -3, -4, 5, -28, 2, 6, 2, -2, 5, 1, 0, 2, 3, -1, -2, -3, 5, 0, 5, 2, -1, -9, -3, 4, -1, 19, 4, -6, 6, 4, 10, 0, -8, 9, -2, 5, -4, -1, 8, -1, 3, 3, -2, -7, 0, 6, -2, 11, -4, -3, -9, -5, 2, -5, -6, 3, 3, 5, -1, 5, 5, -1, -11, 6, -4, -1, 3, 6], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/0/01/Othniel_Charles_Marsh_-_Brady-Handy.jpg", "explanation": ["Imagine you're a detective piecing together clues for a big case. You can't rush to conclusions; you need solid evidence to solve it.", "Darwin was like that detective, meticulously collecting clues about species and their changes over millions of years, ensuring his theory was rock-solid before sharing it with the world."], "example": "Just like a detective wouldn't rush to accuse someone without enough evidence, Darwin didn't rush to publish his theory without thorough research.", "whyItMatters": "The insight is that careful, long-term research is crucial for making groundbreaking discoveries."}, {"id": "bc9762e86642", "title": "Heliocentrism", "slug": "heliocentrism", "headline": "Did you know the Earth orbits the Sun, not the other way around?", "summary": "Galileo Galilei was placed under house arrest for the last nine years of his life for defending heliocentrism", "source": "Galileo Galilei was placed under house arrest for the last nine years of his life for defending heliocentrism", "sourceUrl": "https://en.wikipedia.org/wiki/Heliocentrism", "articleUrl": "https://en.wikipedia.org/wiki/Heliocentrism", "publishedAt": "2026-07-03", "category": "learn", "cohortScore": 0.5, "embedding": [-1, 8, -1, -1, 1, -4, 13, -4, 1, 0, 0, 3, -2, 5, -1, -11, -6, 3, -2, 0, 3, -4, -6, -1, 2, 13, 0, -4, -6, -9, 3, -7, -4, -2, -1, -7, -7, -3, 1, 11, 8, -5, 0, 0, 0, 15, 6, 2, -3, 0, -3, -2, -5, 7, 1, -7, 8, 6, 3, 0, 4, 6, -20, 0, -3, -1, 0, -12, 4, -6, 0, -3, -7, 4, -1, -1, -4, -3, -3, -9, 11, 2, -7, 1, 0, 5, -6, 6, 8, 6, -3, -7, 7, 3, 1, -3, 2, -1, -5, 37, -6, 5, 9, 9, 2, -4, -2, -8, 1, -5, -6, 5, 15, -4, 12, 5, 5, 1, -7, -1, -8, 0, 4, 3, 8, -1, -3, 8, -4, 0, 0, -9, 2, -5, 2, 10, 2, 0, 13, -4, -3, 0, 2, 4, 4, -2, 7, 0, 7, 7, -5, 3, -3, 0, 1, 0, 1, 11, -6, 8, 0, 8, 0, 18, -1, -9, -7, 5, -2, 3, 12, 3, 2, -2, 11, 0, -2, 8, -4, -3, -1, -6, -2, -5, -3, 1, -4, 12, 0, 2, -4, 11, 1, 1, -4, -2, 3, 4, 2, 2, -2, -11, -5, 5, 4, 1, 5, -3, 2, 0, 3, 0, -6, -2, 2, -1, -2, -4, -3, -4, 3, -3, -3, -34, -14, -10, 1, 3, -7, 1, -3, 5, 1, -9, 0, -7, -7, -3, -7, 7, 3, -5, -6, -5, 1, -9, -7, 5, -6, 14, 11, 8, -3, -3, -3, 4, -11, 4, 3, 3, 3, 1, -8, -8, 6, -3, 3, -8, 0, -4, 7, 11, -1, 9, -4, -1, -1, 9, -5, -5, 7, -3, 17, -5, 6, 3, -2, 2, 4, -4, -7, 9, -5, -4, 13, -10, -5, 4, 4, 13, 5, 1, 8, 1, 1, -5, -1, -1, -12, -9, -2, -5, -9, 6, 2, -9, 1, 1, 0, -28, 6, -11, 6, -2, -5, 0, 5, -5, -5, -3, -6, -3, 9, 2, -7, -4, 6, -6, 4, 3, 12, 8, 13, -2, 2, 2, 10, 3, -7, -7, -7, 0, -3, 3, 0, 4, 3, -2, -1, 3, 8, 7, 5, 9, -3, 0, -2, 2, 2, -7, -5, -4, 2, -9, -3, -2, -1, 3, -5, -4, -8, 7, -3, 3], "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/5/57/Heliocentric.jpg", "explanation": ["Imagine you're on a merry-go-round with friends, feeling dizzy as it spins. You realize the ride's center is stationary, while everyone else moves around it.", "The Earth orbits the Sun like you're on a merry-go-round, with the Sun at the center. This is the concept of heliocentrism."], "example": "As the merry-go-round spins, you stay in the same spot while everyone else moves around you.", "whyItMatters": "Remember, the Sun is at the center of our solar system, not Earth."}, {"id": "b3ac49625ecf", "title": "Nikola Tesla", "slug": "nikola-tesla", "headline": "Nikola Tesla developed alternating current and over 300 patents", "summary": "Nikola Tesla developed alternating current and over 300 patents, but died nearly penniless in a New York hotel room", "source": "Nikola Tesla developed alternating current and over 300 patents, but died nearly penniless in a New York hotel room", "sourceUrl": "https://en.wikipedia.org/wiki/Nikola_Tesla", "articleUrl": "https://en.wikipedia.org/wiki/Nikola_Tesla", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-7, 4, 1, 3, -6, 0, 5, 6, 0, -2, -2, 2, 1, 6, 1, 1, -3, -7, -2, 2, 9, 0, 3, 0, -2, 0, 6, -6, 1, -19, -2, -3, -1, -1, -2, -10, -4, -3, 3, 5, -7, -3, 4, 5, 3, 8, -2, -2, 9, 1, 4, -2, 7, 7, 8, -1, 2, 9, 1, 2, -1, 5, -21, 0, 9, -2, -10, -6, 1, 4, 3, 1, -1, -1, 0, -1, -1, -2, -2, -1, 9, -7, -8, 1, -7, 0, 1, -3, -3, 1, -10, -1, 1, -1, 3, 4, -1, 5, -4, 39, 4, 2, 1, -1, -11, 0, -2, -5, -2, 0, 2, 5, 3, -6, 15, 1, 14, 4, -5, 4, -5, 2, 5, 6, -2, 0, 2, 9, -5, 1, -4, 0, -2, 2, 4, 4, 5, -2, 7, 5, -5, 5, -5, -6, 0, -2, 0, -1, -1, -2, 7, 5, 2, -8, 0, -3, 4, 9, 4, 2, -3, 8, -1, 17, -4, -7, -5, 1, 3, -5, 3, 10, -3, 1, 8, 7, 1, 2, 1, 7, 1, -5, 0, 7, -3, 3, 4, 5, 0, 15, 1, 11, -4, 9, -2, -10, -3, 0, 3, -1, -15, -6, -8, 7, -4, 4, 5, -2, 6, -4, -2, -4, 1, 1, -2, -2, -2, -5, 9, -1, 5, 2, -8, -42, -9, -6, -8, 4, -9, -2, -10, -5, -4, -3, 4, -6, 3, 0, 5, 2, -1, -8, -1, -2, 10, 5, -1, 3, 0, 19, -3, -3, -2, 6, 4, 3, 3, 0, 6, 6, 10, -4, 3, -12, 0, -7, 3, -2, 0, -7, -8, -3, 2, 4, -4, -4, -7, -9, -3, -5, 3, 0, 9, -3, -4, 2, 0, 7, -2, -7, 3, -3, -2, -6, 20, 1, -7, 3, -2, 5, -6, -1, 7, -13, 1, 4, 4, -3, -4, -5, -6, -9, -3, -1, -4, -1, 4, 1, 1, -28, 3, 2, -1, -4, 0, -5, -4, 2, 8, -2, -2, 5, 6, 9, -7, 5, -10, 0, 4, 11, 9, 20, -5, -8, 5, -2, 13, -3, -1, -11, -1, -5, -5, 12, 12, -1, -4, -9, 0, -7, 4, 5, 2, 10, 3, -3, -12, -6, -3, -3, -5, 0, 5, -3, 2, -1, -3, 2, -5, 0, 1, 4, 0, 10], "explanation": ["Tesla's AC induction motor and related patents were instrumental in establishing the polyphase AC system, which was widely marketed by Westinghouse Electric, leading to significant financial success for Tesla during his lifetime."], "whyItMatters": "Understanding Tesla's life highlights the contrast between his immense contributions to technology and the unfortunate circumstances of his financial struggles at the end of his life.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/7/79/Tesla_circa_1890.jpeg"}, {"id": "5d13ba82f745", "title": "Rosalind Franklin", "slug": "rosalind-franklin", "headline": "Rosalind Franklin's X-ray diffraction image, known as Photo 51, was critical to discovering the structure of DNA", "summary": "Rosalind Franklin's X-ray diffraction image, known as Photo 51, was critical to discovering the structure of DNA", "source": "Rosalind Franklin's X-ray diffraction image, known as Photo 51, was critical to discovering the structure of DNA", "sourceUrl": "https://en.wikipedia.org/wiki/Rosalind_Franklin", "articleUrl": "https://en.wikipedia.org/wiki/Rosalind_Franklin", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-2, 4, 0, 1, 10, 0, 4, 6, -8, 2, 4, -5, -3, 5, -4, 5, -1, 7, -3, 3, 3, -2, 3, -15, 6, 5, 4, -6, -5, -22, 0, 10, 7, -2, 3, -8, 0, -1, -8, 0, 8, -4, 4, 2, -3, -1, -5, -5, 2, -8, -5, -5, -2, 1, -2, 11, 6, -2, 2, -1, 3, 3, -18, 3, 11, -1, -6, -10, 1, 2, -10, 5, 3, -4, 4, -3, -1, -9, 3, -4, -3, 5, 4, -2, -5, -1, -3, -8, -1, 2, 2, -5, -7, 1, -5, -2, 0, 4, 9, 46, -8, 1, 2, -6, -7, -5, 2, 0, -7, 1, 11, -4, 4, -3, 1, -5, -8, -3, -7, 0, -3, -2, 8, 1, -4, 3, 2, 5, 1, 0, 5, -1, 1, 1, -6, 8, 1, -5, 0, 6, -3, -9, -2, 6, -6, 9, -1, 12, 3, 1, 2, 7, -7, 1, 6, -6, -1, 9, 3, 4, -6, 1, 0, 9, 6, -6, 2, 6, 1, -4, 10, 0, -6, -3, -1, -4, 2, -2, 7, -4, -1, -10, -2, 0, 8, -4, -1, 8, 3, 10, 4, 11, -1, 8, -8, -6, -6, 4, -7, 1, 2, -1, 0, 12, 1, -3, 14, 2, 3, -3, 0, 0, -6, -1, -7, 2, 7, 1, 5, 2, 8, -9, -16, -44, 1, -9, 8, 0, -4, 1, 2, 5, 1, 3, 5, 3, -12, -3, -4, 3, -6, -7, 5, -3, 4, 2, 3, 2, -2, 16, 6, -4, 6, -3, -1, -5, -1, -1, -4, 4, 6, 0, 1, 5, 1, 0, 1, -2, 3, -2, 6, 6, 3, 7, 3, -5, 3, -5, 0, -6, -2, -10, 0, -1, -2, -7, 2, 3, -5, -4, 2, 7, -5, 3, 16, 1, -2, 3, 8, 4, -11, -5, -1, 3, 3, 2, 1, 3, -1, 4, -6, -1, -2, 0, -1, -4, -4, 3, -2, -36, 1, -4, 0, -2, 7, 13, 1, 7, 4, -4, -1, 8, -2, -5, 9, 4, -3, -3, 0, 1, 5, 17, -3, -3, -5, -4, -1, -4, -1, 0, 1, -4, 3, -1, 3, -2, 1, 0, -6, 2, 0, -7, 0, 7, -3, -5, -2, 0, -4, -7, 3, -1, -9, 0, -1, 2, 2, 9, 0, 2, 3, -2, 10, 1], "explanation": ["Rosalind Franklin's work was central to understanding the molecular structures of DNA. Her X-ray diffraction image, known as Photo 51, played a crucial role in the discovery of DNA's double helix structure. Franklin's contributions were largely unrecognized during her lifetime.", "Franklin's Photo 51 provided essential data that helped James Watson and Francis Crick deduce the double helix structure of DNA. This image was a turning point in molecular biology, leading to a deeper understanding of genetic material.", "Despite her significant contributions, Franklin did not receive the recognition she deserved during her lifetime. Her work has since been acknowledged as pivotal in the discovery of DNA's structure, highlighting the importance of her contributions to science."], "whyItMatters": "Rosalind Franklin's Photo 51 was a turning point in understanding DNA's structure, demonstrating the critical nature of her work in molecular biology.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/f/fd/Rosalind_Franklin_%28retouched%29.jpg"}, {"id": "6dce0c4d4ba6", "title": "Gregor Mendel", "slug": "gregor-mendel", "headline": "Gregor Mendel's pea-plant experiments laid the foundation for modern genetics", "summary": "Gregor Mendel's pea-plant experiments founded modern genetics, but his work was ignored for 35 years until rediscovered in 1900", "source": "Gregor Mendel's pea-plant experiments founded modern genetics, but his work was ignored for 35 years until rediscovered in 1900", "sourceUrl": "https://en.wikipedia.org/wiki/Gregor_Mendel", "articleUrl": "https://en.wikipedia.org/wiki/Gregor_Mendel", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-4, 5, 2, 1, 2, -1, -5, 0, -13, -1, 3, -6, 4, 3, 3, 3, -8, 5, -3, -1, 11, -5, 0, 3, 9, 7, -5, 1, 3, -21, -4, 5, 2, -4, 6, -1, -1, -12, -4, 11, 3, -1, 7, 0, 0, 9, -3, 6, -2, -7, -8, -2, -2, 0, -2, 10, 7, 0, -4, 5, 2, -2, -21, 0, 6, 3, -5, -12, 13, 6, -5, 7, 5, 3, 2, -1, -5, -6, 6, -1, 6, -4, 6, -1, -13, -4, -2, -4, 2, 5, 0, -6, 2, -5, -3, 4, 4, -1, 4, 47, -5, 9, -2, 6, -2, 1, -5, -7, 1, 3, 5, -2, 4, 4, 8, -8, -1, -1, 4, 5, -1, 5, 4, -6, -3, 5, -3, 12, 7, -10, 8, 5, 0, -3, 1, -2, 0, -3, -1, -8, 1, -2, 3, -3, -8, 3, 3, 4, -5, -1, 0, 4, 3, 0, 7, 3, 4, 4, 4, 0, -9, 6, -2, 10, 7, -4, 1, 1, 8, -3, 2, 0, -5, 4, -5, -3, -4, 3, -2, 1, 8, -7, 0, 3, -1, 2, -1, 4, -4, 9, 7, 5, -6, 4, -4, -11, -3, 1, 0, 0, -9, -6, 4, -3, -8, 4, 0, -6, 8, 1, -5, 0, -1, -5, -9, 1, -1, -7, 9, 6, 2, -3, -15, -39, -9, -7, 2, 11, -7, -12, -1, 2, -2, -1, 8, -4, 1, 2, -4, 9, 0, -4, -1, 4, 3, 2, -8, -8, -7, 13, 3, -2, 1, 4, 1, -3, -5, -6, 0, -2, 3, 0, 1, 3, -4, 0, 4, -15, 8, 6, -1, 3, 1, 1, -2, 3, 1, -8, -4, -10, 6, -1, 5, 3, 0, -4, -3, -6, -11, -7, 1, 2, -3, 4, 15, -3, -6, 5, 7, 3, -9, -5, 0, -1, 1, 2, 9, -3, 3, -1, -7, 4, 4, -6, 2, -5, 3, 6, 0, -28, 7, 1, 4, 0, 4, 6, -5, 1, 3, 6, -1, 10, 5, 0, 4, 3, -6, 0, -10, 3, 6, 18, -13, -1, 2, 4, 1, -4, 2, 2, 6, 6, -13, -5, 4, 2, -7, 0, 0, -8, -4, -6, 0, 10, -2, 0, -6, 7, 5, 3, 3, 5, 8, -1, 5, -2, 3, -4, -4, 1, 7, -3, 10, 0], "explanation": ["Gregor Mendel, an Austrian biologist, conducted groundbreaking experiments on pea plants between 1856 and 1863. He discovered the fundamental laws of heredity, now known as Mendelian inheritance, by studying seven characteristics of pea plants. Mendel's work was initially ignored but later recognized as pivotal to the field of genetics."], "example": "Mendel cross-bred true-breeding yellow pea plants with true-breeding green pea plants, resulting in offspring that produced yellow seeds. In the next generation, the green seeds reappeared at a ratio of 1 green to 3 yellow seeds.", "whyItMatters": "Mendel's discoveries are crucial because they established the basic principles of inheritance, forming the foundation for modern genetics and our understanding of heredity.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/b/ba/Gregor_Mendel_2.jpg"}, {"id": "5e5fed1bb8d4", "title": "Periodic table", "slug": "periodic-table", "headline": "Dmitri Mendeleev arranged the periodic table by atomic weight and left gaps for elements he predicted would later be discovered", "summary": "Dmitri Mendeleev arranged the periodic table by atomic weight and left gaps for elements he predicted would later be discovered", "source": "Dmitri Mendeleev arranged the periodic table by atomic weight and left gaps for elements he predicted would later be discovered", "sourceUrl": "https://en.wikipedia.org/wiki/Periodic_table", "articleUrl": "https://en.wikipedia.org/wiki/Periodic_table", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [0, 9, 2, -5, 1, -5, -6, 9, -2, -2, 2, 0, 2, 2, 10, -3, -14, 2, -7, -4, 7, -3, -3, -9, 8, 13, 1, -3, 2, -23, -3, 2, 9, -13, 3, 4, -2, -4, -9, 5, -4, 0, 8, 1, 0, 0, 4, 0, 3, 2, -5, 5, 4, 3, 7, 12, 2, 3, -3, 7, 3, -8, -15, 1, 7, 0, -10, -11, 8, 8, 6, 2, 6, 3, 4, -2, -2, -8, -1, -1, 6, -1, -6, -1, -1, 4, 1, -4, -6, 2, -1, -3, -2, 2, -3, 2, 1, 4, 2, 43, -7, 4, 1, -1, -4, -1, -6, -7, -5, -6, 4, -3, 2, -9, 5, 1, 4, 4, 2, -2, -1, 1, 5, 1, -1, 1, -6, 11, 3, 0, -1, -7, 0, 4, 2, 5, 2, -4, 6, -9, -8, -2, -2, -8, -6, 14, 1, 1, 5, -3, 1, -1, 4, -7, 1, 2, -4, 3, -7, 9, -7, 7, 1, 10, 6, 1, -6, 0, 7, -13, -2, 8, -7, 10, 2, -2, 5, 1, 3, 7, 10, 1, -8, 0, -2, -1, -3, 0, 4, 3, 7, 17, 0, 5, -10, -8, -2, -3, -3, -8, -4, 0, -2, 3, -1, -7, 6, -3, 1, -2, 2, -1, -1, -3, 3, -10, 9, -14, 2, 0, 2, -5, -8, -38, -10, 2, -3, 5, 3, 4, -3, -3, -4, -1, 3, -10, -8, -9, 0, 3, -7, -10, 6, -3, 8, -9, -4, -2, -2, 15, 0, -7, -5, 4, -3, -4, 6, -4, -2, -1, 3, 5, -2, -2, -1, 6, 4, -5, -1, 1, -11, 11, 2, 3, 5, -7, 5, 1, -5, -7, 6, -2, 3, -7, -4, -2, 10, 1, 2, 1, -4, 6, -4, 4, 14, -7, 0, 9, -2, 1, 2, -1, 4, -3, 4, 7, 3, 4, 3, -8, -5, -5, 9, -6, 9, 0, 4, 3, 4, -32, 4, 4, 5, 0, 4, 6, -3, -4, 1, -1, -4, 4, -6, 0, -4, 5, -4, -5, 0, 2, 5, 23, -8, -6, 4, 10, -1, -2, 6, 3, 1, 3, -3, -1, 9, 1, 2, 0, -5, -8, 2, -6, 6, 5, 4, -3, -8, 6, 5, -1, 4, 4, 1, -4, 1, -8, 3, 3, 0, 0, -1, 4, 1, 1], "explanation": ["Mendeleev's work laid the foundation for the modern periodic table, which is arranged by atomic number. His contributions significantly advanced the field of chemistry."], "whyItMatters": "Mendeleev's predictions and organization of the periodic table were crucial in establishing the modern understanding of chemical elements and their properties.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Colour_18-col_PT_with_labels.svg/1280px-Colour_18-col_PT_with_labels.svg.png"}, {"id": "844a0980a922", "title": "Henrietta Swan Leavitt", "slug": "henrietta-swan-leavitt", "headline": "Henrietta Leavitt discovered the period-luminosity relation of Cepheid variables", "summary": "Henrietta Leavitt discovered the period-luminosity relation of Cepheid variables \u2014 the foundation for measuring cosmic distances", "source": "Henrietta Leavitt discovered the period-luminosity relation of Cepheid variables \u2014 the foundation for measuring cosmic distances", "sourceUrl": "https://en.wikipedia.org/wiki/Henrietta_Swan_Leavitt", "articleUrl": "https://en.wikipedia.org/wiki/Henrietta_Swan_Leavitt", "publishedAt": "2026-06-12", "category": "learn", "cohortScore": 0.5, "embedding": [-7, -1, 4, 5, -4, -7, 2, 0, 4, -3, 2, -5, 0, 3, -1, -5, -6, 10, -11, 4, 10, -7, 1, -6, 5, 8, -3, -6, -10, -27, -4, 0, 11, -2, -1, 4, -1, 3, -1, 3, 10, 2, -3, -6, -2, -9, -2, 9, -5, 3, -4, -1, -2, 5, 4, 16, 5, 2, 5, 1, -2, 6, -26, 1, 7, -5, -2, -17, 0, -1, -3, 4, -1, 6, 3, 5, 1, -2, 0, -2, 5, 1, 7, 4, 0, -4, -1, -4, 0, -1, -7, -1, -6, 4, -2, -3, 2, -1, 11, 47, -4, 3, -1, 3, 4, -1, -2, -7, 3, -2, 5, -2, -5, -8, 7, -1, 4, -3, -4, -1, -1, 1, 1, -3, -6, -5, 4, 13, -2, -2, 2, 5, -1, 2, -1, 6, 11, -9, 4, 2, -1, -6, 5, 3, -5, 9, 4, 0, 2, 0, 1, 1, -5, -4, 0, 3, -1, 11, -2, 7, -4, -3, 3, 10, 4, -11, 6, 8, 2, 1, 6, -1, -10, 4, 12, 0, -5, 5, -2, 1, -4, -3, 0, 3, -1, -10, 1, 1, -4, 0, 7, 2, 2, 6, -3, -9, -1, 2, -9, -3, -5, -7, 1, 4, -1, -6, 8, -5, 10, 8, 0, -5, -8, -7, -3, 5, 3, -7, -2, 0, -2, -7, -14, -41, -8, -7, -9, 9, -5, 2, 6, -4, 0, -1, 6, -10, -5, 7, 3, 4, 2, -7, -1, 1, 5, -7, 0, -7, 0, 14, 1, 2, -3, -1, 0, -3, 0, -4, 2, -2, 3, -3, -3, -5, 1, -2, 3, -1, 4, 6, 4, 2, -2, -1, 4, 2, 1, 2, 3, -8, 4, -5, 5, 0, -1, -1, -8, -1, -1, -5, -3, 7, -5, 3, 9, -13, -2, 0, -4, 5, 3, -2, 5, 11, -4, 4, 6, 0, 5, 4, -3, 3, -5, -6, 0, -9, 1, -1, 1, -30, 3, 4, -2, -1, 5, 6, -4, 3, -5, -3, 1, 4, 5, 1, 7, 4, -4, -4, -3, 5, 6, 21, 4, 0, 0, 3, 6, -5, 1, -4, 3, 2, -2, -4, 15, 3, 3, 6, 0, 4, -3, -3, 2, 7, 4, 1, -6, -2, -4, -7, -3, 0, 8, -4, 8, -6, 5, 2, -4, -3, -1, 1, -4, 7], "explanation": ["Henrietta Swan Leavitt's groundbreaking work at the Harvard College Observatory led to a significant advancement in astronomy. Her discovery of the period-luminosity relationship for Cepheid variables provided a new method for measuring cosmic distances.", "Leavitt's discovery was a monumental leap forward because it extended the range of measurable distances beyond the limitations of stellar parallax. Before her work, astronomers could only measure distances up to several hundred light years. Leavitt's insight allowed for the measurement of distances to other galaxies, vastly expanding our understanding of the universe's scale.", "Her discovery provided astronomers with the first standard candle for measuring distances to other galaxies. This was crucial for determining the scale of the universe and understanding its nature. Leavitt's Law remains a fundamental tool in modern astronomy for calculating cosmic distances."], "whyItMatters": "Henrietta Leavitt's discovery of the period-luminosity relation for Cepheid variables was crucial for measuring cosmic distances beyond the range of stellar parallax. Her work expanded our understanding of the universe's scale and remains a fundamental tool in modern astronomy.", "imageUrl": "https://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Henrietta_Swan_Leavitt.jpg/1280px-Henrietta_Swan_Leavitt.jpg"}]}