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TIL The origin of 10,000 steps a day started as a marketing slogan by a Japanese company when they made the world's first pedometer in the 1960s named Manpo-kei, or “10,000 steps meter." The science behind 10,000 steps a day is based on this catchy ad.

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Vr6B TIL in the last 5 millennia, genetic change in humans has occurred at a rate roughly 100 times higher than any other period of human evolution. Humans today are more genetically different from humans living 5,000 years ago than these people were from humans living 40,000 years ago.
GY4WN TIL that the plane John McClane blows up in Die Hard 2, N473EV, was later nearly destroyed in reality by extreme turbulence which caused one engine to be completely torn from the plane mid-flight.
LK8r TIL that the Soviet Secret Police on Stalin’s orders executed 22,000 Polish officers but Roosevelt and Churchill had to deny it and blame the Nazis in order to maintain their alliance with Stalin
MZgB TIL That the during the official opening of the Sydney Harbour Bridge in 1932 a man on horseback cut the ribbon with his sword, upstaging the senior politician who was supposed to cut it.
R5W18 TIL We have at least a 50/50 chance, if we could travel there today, of finding at least some form of primitive life on a planet (K2-18B) that is 124 lightyears away given markers in the atmosphere, JWST observations, and the chemical and physical parameters of the planet in relation to it's star.