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TIL that French mathematician Abraham de Moivre noticed that he slept more and more as he grew older, and predicted he would die on the day his sleep reached 24 hours. He did indeed die on that day.

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kOQ8m TIL that America imported 1600 high-ranking Nazis to come live in the South right after WW2. It was called "Operation Paperclip". The American people even celebrated one of them as a celebrity.
x6Nx7 TIL in treatment studies, the placebo effect is sometimes enhanced when a participant taking a placebo has regular appointments with a researcher, especially in elderly people who are more reclusive.
Z866v TIL when Gandhi's wife came down with pneumonia, he denied her penicillin, even though doctors said it would cure her; he insisted the new medicine was an alien substance her body should not take in. She died from it in 1944. Just years later, he took quinine to treat his own malaria. He survived.
OYWY TIL that there are Ant Species which hold Slaves and Slave Ants who rebel against them.
Rl8j TIL George Zimmer, the owner and founder of The Men’s Wearhouse, does not background check his employees. “I don’t trust the U.S. justice system to get it right,” says Zimmer, who is himself a recovering alcoholic. “I’d rather make my own decisions, and I believe in giving people a second chance.”