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TIL The United States has no official language at the federal level. Hawaii recognised Hawaiian Pidgin English and South Dakota made Sioux an official language.

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epmK4 TIL that American physicist Richard Feynman once faced off against a Japanese abacus expert to see which could calculate faster. The abacus consistently won on more simple operations, but Feynman was faster in division and complex calculations such as cube roots.
9e5X TIL that Scientists replicated 100 Psychology studies, and fewer than half got the same results
GA9kE TIL that Meriwether Lewis suffered bouts of depression and probably committed suicide only a few years after completing the famous Lewis and Clark expedition.
wmlW TIL that an influential feminist theorist published that E=MC2 is a sexist equation for giving the speed of light too much privilege and that men cannot understand fluid mechanics because they don’t menstruate which leaves them unfamiliar with fluids.
QNkVX TIL If you heat the diamond in the open air, it will begin to melt and burn at around 700 degrees Celsius (1,292 degrees Fahrenheit). Burning a diamond without oxygen, however, will make it change into graphite (a crystalline form of carbon) before transforming into a fluid.