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TIL Bird’s nest soup is considered a delicacy in China. It is made from the nests of birds called swiftlets, who make the nests using their own solidified saliva. These nests are sold at prices up to about $6,6000/kg.

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OEZL TIL when Tiberius made it illegal to pay a prostitute with a coin that bore the image of the emperor, brothels began issuing Prostitute Tokens, with depictions of the sexual act on the front and the price on the reverse.
0gyN TIL that The Matrix was inspired by a philosophical concept called ‘Brain in a vat’ which can theoretically be proven yet remain unproven forever.
e0A94 TIL President Jimmy Carter left nuclear codes in the pocket of his suit jacket, and sent it to the dry cleaners. They threw it in the bin.
N765Q TIL about Dr. Chester Southam who injected live cancer cells into people with questionable ability to consent, including senile patients under long-term care. He was charged with unprofessional conduct and later went on to become President of the American Association for Cancer Research
QZoE TIL Ancient Library of Alexandria, in Egypt, was in charge of collecting all the world’s knowledge. Any books found on ships that came into port were taken to the library where Official scribes then copied these writings. Originals were kept in the library, and the copies delivered to the owners.