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TIL most world languages don’t distinguish between blue and green

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x65aD TIL the USA hasn't had a single fatal commercial airline crash since 2009!
4Xdm5 TIL That Leonardo Da Vinci once conducted an experiment to understand the flow of blood through the valves of the heart, by pouring hot wax into one, making a mould of thin glass from the cast, and then pumping water mixed with seeds through it. He saw how a heart actually regulates itself.
xVkgk TIL that after Patton liberated Ohrdruf, the first liberated concentration camp, he brought the mayor and the mayor's wife to see the camp. After they left, they hanged themselves.
WQPL TIL that 160 people were able to guess the number of jelly beans in a jar accurate to .1% when their answers were averaged. Out of 4510 beans, the average guess was 4514. The phenomena is known as wisdom of the crowd.
XRJD TIL H. G. Wells created a tabletop-esque war game, in 1913, called “Little Wars; a game for boys from twelve years of age to one hundred and fifty and for that more intelligent sort of girl who likes boys’ games and books.” which can be read and downloaded via Project Gutenberg.