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TIL Having an autistic sibling increases your chances of having autism by 6.9 times

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eXWk TIL in 1938, 150 women chained themselves to cherry trees in Washington DC in protest of plans to cut the trees down to clear space for the Jefferson Memorial. The protest ended when they had to use the bathroom.
OobK1 TIL that in 1971, as part of an experiment to study the causes and effects of landslides, Japanese scientists watered down a hill using fire hoses to simulate the effect of a torrential rainstorm. The soil on the hill gave way and the resulting landslide killed 4 scientists and 11 observers.
P1b0G TIL that researchers believe that up to 65% of people with Klinefelter syndrome (XXY chromosomes) are never diagnosed. The condition usually isn't diagnosed until puberty or adulthood because of how mild the symptoms are.
EgVx7 TIL A stray cosmic ray is believed to have struck a computer during an 2003 Belgian municipal election and given one of the candidates exactly 4,096 more votes than she should have gotten.
bkWp TIL: It costs about 5 cents to make 4 cents.