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TIL that in 1994, a nutrition researcher published a groundbreaking discovery in diabetes care and named it after herself. Nobody noticed that it was just basic calculus, known for over 2,000 years.

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M7xr0 TIL that ruminants, such as cattle, sheep, and giraffes, do not have a top row of front teeth. They instead have a dental pad where gums meet directly to their bottom row of front teeth.
Yw4W TIL: Lobsters used to be so abundant and cheap that people though of them as trash food and fed it to their cats; it was also a staple of servants, soldiers and prisoners.
QJR4e TIL adult cats rarely meow to each other, so an adult cat meowing to human beings is probably a post-domestication extension of meowing by kittens, a call for attention.
xy8w TIL there’s a castle being built using only the techniques and materials used in the Middle Ages. When completed in the 2020s, it should be an authentic recreation of a 13th-century medieval castle.
9dJB TIL that as many as 20% of women in 18th century London worked as prostitutes