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TIL “Jay” used to be slang for a foolish person. So when a pedestrian ignored street signs, he was referred to as a “jaywalker.”

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0kRM TIL there exists patents for a nuclear powered drill that heats up the tip of the drill to high enough temperatures to melt rocks and create a glass coated tunnel.
J1Bml TIL of Tilikum (Tilly) - a killer whale responsible for 3 of the 4 recorded human deaths by a captive killer whale.
OGYW1 TIL about the world's roundest object the Heason sphere. If this tiny sphere was blown up to the size of the earth, the height difference between the lowest point in the deepest ocean and the highest mountain would be just 10-15 feet.
yVAX8 TIL Mozart wrote a concerto for flute and harp on commission for a French flutist and his harpist daughter. Mozart was never paid for the pierce and therefore he never wrote for the harp again. In Mozart's 40 concertos, he only wrote once for the combined flute and harp
ZpAZQ TIL: There was a hippie paradise in Nepal and weed was legal there before 1973 after which the USA forced Nepal to criminalise Cannabis.