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TIL Leonhard Euler was the most prolific mathematician of all time. He wrote more than 500 books and papers during his lifetime — about 800 pages per year — with 400 further publications appearing posthumously. His collected works and correspondence are still not completely published

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16wnV TIL That during WW2, President of China Chiang Kai-Shek had to be kidnapped by two of his generals to a negotiating table with the Chinese Communist Party rebels to negotiate a ceasefire that would let him make preparations for the Second Sino-Japanese War.
e0J5n TIL Fart spray was originally designed for use in pranks but is now more widely used in combat-zone medical training.
N7bb6 TIL FDR's White House housekeeper, Henrietta Nesbitt, was a legendarily awful cook. “Of course Henrietta did not personally do the cooking,” wrote a former WH maid, “but she stood over the cooks, making sure that each dish was overcooked or undercooked or ruined one way or another.”
W7G1o TIL about "Sazae-san syndrome", a feeling of Sunday night blues named after one of the longest-running anime Sazae-san, which airs on Sundays from 18:30 to 19:00 in Japan. The end of each episode reminds viewers that the weekend is coming to an end, triggering a sense of depression.
a8MVM TIL a 2022 study revealed that Belgium's ban on loot boxes in video games had not been enforced by the Belgium Gaming Commission and that 82 of the 100 highest-grossing iPhone games were still selling loot boxes.