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TIL The first woman mathematician recorded by history was Hypatia of Alexandria (AD 350 - 415).

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ADoEn TIL The offensive term 'Mongoloid' or 'Mongol' derives from an old word for people with Downs Syndrome. This was due to the shape of their eyes, with the epicanthic fold resembling that of the Mongolian race.
6DXl TIL there’s a city in South Dakota called Gettysburg. Its slogan is “Where the Battle Wasn’t.”
aw5m9 TIL when he was 13, Davy Crockett attacked a school bully. Fearful of his father’s punishment, he ran away from home. Over the next two and a half years, he did odd jobs, learned several woodsman skills and traveled around in 3 states. When he finally returned home, his family couldn't recognize him
xVNxo TIL A German u-boat was sunk by it's own toilet in WW2
xVJv0 TIL that if you add 250ml of ethanol to 250ml of water, you get less than 500ml of liquid. This is due to strong hydrogen bonding that draws the different molecules close together, and because ethanol interferes with any open structures in the water, causing the molecules to pack closer together.