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TIL about the popular myth of the dinosaur "butt brain" or "hind brain", a second brain located near the hips that was supposed to control the movement of the legs and tail

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6xZw TIL that to leave a social gathering without saying goodbye to anyone is called the “Irish goodbye” or the “French leave”. The French call it the “filer à l'anglaise”.
6EWvY TIL about New Zealand's first tank, the Bob Semple tank. It used corrugated iron armor on a tractor base, with 6 machine guns as armament. After public ridicule, Bob Semple stood by his design, saying "I don’t see anyone else coming up with any better ideas."
aPKy TIL in the US, maternal deaths during pregnancy declined to 9.1 deaths per 100,000 pregnancies by 1986. It has risen since then and now is at 18.5 deaths per 100,000.
D8re TIL of the smoke filled room experiment, which shows that even if there’s smoke filling a room people will stay for as long as 20 minutes if no one else is reacting to it. Otherwise they’d leave quickly.
jN4Lv TIL the band Heart's 1985 hit "What About Love" is a cover, originally written and performed by the Canadian band, Toronto.