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TIL sperm whales seek out habitats with large communities of bioluminescent plankton, which are not part of the whale's diet. As the plankton's predators (fish) approach the plankton, their glowing alerts the whale. The whale eats the fish. The plankton then turn out their lights.

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neGx9 TIL that after the 2015 terror attacks in Paris, the German football team was advised not to leave the stadium they were playing in due to threats on their hotel, so they slept in the stadium on mattresses. The French team they had just played against stayed the night with them, out of solidarity.
9jpB TIL When George Foreman was asked why he named all 5 of his sons “George” he replied “Joe Frazier, Muhammad Ali, Ken Norton, Evander Holyfield…you let them hit you on the head and see how many names you can think of”
kJLV1 TIL although the Walther PPK is more known for being the gun James Bond uses ("Ian Fleming's choice of Bond's weapon directly influenced the popularity and notoriety of the PPK"), it was also the same gun that Hitler used to commit suicde
oRAOr TIL In the US, in 1880, the ages of consent were set at 10 or 12 in most states, with the exception of Delaware where it was 7. Today it ranges from 13 - 21
Me0gB TIL some of the first high heels were worn by ancient Egyptian butchers to avoid walking in blood