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TIL tomato is both fruit and vegetable
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britannica.com
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reddit.com
D1Wyv
TIL Of the bizarre "Huron King" nuclear test, which involved detonating an underground nuke, exposing a satellite in a special test chamber to radiation. The chamber was then dragged to safety before it fell in the crater
6ZLX
TIL: The world’s oldest known smiley was on a 1635 Slovakian document, indicating the writer’s happiness with the state of the Chamberlain of Trenčín’s financial records.
loJQG
TIL that the astronauts of Apollo 11 were refused life insurance, so they signed photos of themselves so that their families could auction them for money in case the landing failed and the crew were killed.
d86E8
TIL: the "law of the instrument", a cognitive bias that involves an over-reliance on a familiar tool. As Abraham Maslow said in 1966, "I suppose it is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail."
e0RxE
TIL That most female cheetahs go their entire lives without raising a single cub to maturity. The species is dependent on "supermoms" that are particularly adept at raising cubs. One such supermom, Eleanor, has mothered at least 10% of all adult cheetahs in the southern Serengeti.