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TIL the Yongle Encyclopedia was six times larger than the Encyclopædia Britannica despite being written 300+ years earlier. It was regarded as the world's largest encyclopedia from 1408 to 2007

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aK5A TIL A Michigan rock collector found an impressive 93 lb. Petoskey stone in Lake Michigan in 2015, only to have it promptly confiscated by authorities. The stone violated a Michigan law that states no more than 25 pounds of rocks or minerals can be taken from the Great Lakes per year.
lxGr TIL the grip of a sloth is so strong that sometimes when they die, they are found still clinging to the very branch they were lounging from when they were alive
wvN7 TIL that Titanic survivor, Katherine Gilnagh, who was 16 when the Titanic sank, didn’t realise the seriousness of the ship’s situation until she reached New York. She thought that disembarking in lifeboats and being picked up by another ship was all part of the journey.
rNEly TIL Cleveland Brown QB Frank Ryan won the NFL title in 1964 and earned his Ph.D. from Rice in Mathematics in 1965. During the late 60's he was a Professor at the Case Institute of Technology, and would teach classes in the morning and then attend Football training in the afternoons.
OmVe TIL, Truvada, the most effective HIV drug, can be used as a “morning after” pill to stop the spread of the virus. The drug is as effective as using a condom for stopping HIV.