The word 'quarantine' comes from 'quaranta giorni'

List of poisonous plants

Tomatoes were considered poisonous in Europe for 200 years — they're in the nightshade family

Hot chocolate

Chocolate was a bitter drink in Mesoamerica for 3,000 years before Europeans added sugar

Discovery of penicillin

Alexander Fleming discovered penicillin by accident in 1928

Croissants are not French

Croissants originated in Vienna, not France, as a celebration of defeating the Ottoman siege

Smallpox vaccine

Edward Jenner created the first vaccine in 1796

Honey never spoils

Edible honey preserved for 3,000 years in Egyptian tombs