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TIL that during the prohibition in the 1920s, the United States government poisoned the alcohol in an attempt curtail enthusiasm for the drink, resulting in an estimated 10000 deaths. The move had little effect, and prohibition failed, ending in 1933.

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j6ZKM TIL of Pigeon Guided Missiles where pigeons would follow an image, pecking at it, which would move the screen on its pivots. The sensors would detect the movement and send signals to the control surfaces, which would steer the bomb in the direction the screen had moved.
e0XoJ TIL a babirusa's tusks grow upwards through the skin, curve back, and can get so long they penetrate the babirusa's own skull, killing it.
grwM9 TIL seven of the thirty-nine signers of the US Constitution were not native to The Thirteen Colonies: Pierce Butler, Thomas Fitzsimons, James McHenry, and William Paterson were born in Ireland, Robert Morris in England, James Wilson in Scotland, and Alexander Hamilton in the West Indies.
arlL TIL that five days before the bombing of Hiroshima, the U.S. Army Air Force dropped one million leaflets over the city and 33 other Japanese cities warning that those cities were going to be destroyed
KevR TIL that journalists in the UK learn a form of shorthand known as Teeline. It allows people to take notes at over 150 WPM