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TIL that an average of 2 amputations occur weekly at US meatpacking plants.

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BgKlx TIL that before Roger Bannister ran a mile in 1954 in 3 minutes and 59 seconds, it was believed that running a mile in under 4 minutes was impossible, and would make your heart explode. Thousands of people have done it since then.
E10NV TIL the Deadpool film was only given the green light after test footage shot by the directors two years earlier was mysteriously leaked online. At first Ryan Reynolds thought one of the directors had released the footage but whoever leaked the footage at 20th Century Fox still remains anonymous.
9jBG TIL that British spies used semen as invisible ink during WWI. The method was invented by Captain Sir Mansfield Cumming.
6EoEW TIL The first streaming music service started in 1897. Users in New York could pick up their phones and connect to the Telharmonium, a central hub that would pipe music being played live by two musicians playing 24 hours a day.
vPGQ7 TIL that Levamisole, a veterinary deworming agent, now used to treat nephrotic syndrome in children, was once rampant as an adulterant for cocaine. It resulted in increased renal injury, vasculitis and necrosis of skin.