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TIL a videogame developer hid a marriage proposal in a game, but his girlfriend refused to play the game for years, delaying their eventual marriage

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grvGy TIL Fritz Haber invented a process of ammonia synthesis both to save the world from starvation and to serve the German war machine. He never saw the creation of Zyklon B from his process and its use by the Nazis to kill his relatives in the gas chambers.
N7EON TIL about Emilie du Châtelet, a scientist who in 1749 feared that bearing a child at 42 would be the last thing she did. She worked furiously on a magnum opus that would eventually change the world of physics. Within days of completing her work, she gave birth to a daughter and died soon after.
rRe8y TIL Colored gems (e.g. rubies and sapphires) at Tiffany & Co. are a massive ripoff because they do not clearly disclose fracture filling treatments. Infused with "colorless substances to improve color and clarity" is the difference between a $100/carat ruby and a $10000/carat ruby.
VMAN0 TIL that Mythbusters got bullied out of airing an episode on how hackable and trackable RFID chips on credit cards are, when credit card companies threatened to boycott their TV network
R9R4 TIL geneticists believe that everybody on earth is at least 50th cousin to everybody else.