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TIL a cave pool in Death Valley called Devil’s Hole experiences a “desert tsunami” when high magnitude earthquakes occur even thousands of miles away, risking endangering the pupfish species which exist nowhere on earth but this cave in heart of one of the most dry deserts on earth.

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YeXP TIL In 2011, a man shot a high powered rifle at the White House, hitting it at least 7 times. It took Secret Service 4 days to realize this, and they did so only after a housekeeper noticed broken glass and cement on the floor.
6EDPm TIL more than half the US states have laws requiring employers to give people time off to vote. Some states even require the employer to pay your wages while you're voting!
v1lXR TIL: Jimi Hendrix was inspired to write "Purple Haze", following a dream where he could walk under water. Later, Hendrix expressed frustration at being unable to develop his ideas for the song further.
4k9pJ TIL Aristotle wrote the heart has only three chambers, and that tiny organisms can be generated spontaneously out of inanimate matter. It is now known that the left atrium is very difficult to observe and took Louis Pasteur to prove that growth doesn't happen in a container without micro-organisms
R9vQ TIL a woman spent 12 years in a Kansas mental institution against her will after being diagnosed as a schizophrenic because they assumed she was mentally ill and speaking gibberish. She was really Tarahumara Indian from Mexico who spoke a rare dialect.