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TIL that the chainsaw was invented by doctors to perform surgery.

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QNPwL TIL what's inside a bowling ball.
oBG6W TIL NASA scientists have confirmed there is water on the surface of the moon. Researchers previously found evidence of hydration on the surface, but it was unclear whether that hydrogen was in the form of hydroxyl – the chemical for drain cleaners – or in the form of H2O, or water.
QJBr6 TIL during the apartheid era in South Africa some of the tests to decide ancestry of a person included pinching to see what language they would say "Ouch" in and putting a pencil in the subjects' hair to see if it would fall off.
R7MAl TIL that while he often said "my dear Watson" and "elementary", Sherlock Holmes never actually said the often used quote "Elementary, my dear Watson".
mMVp TIL NOAA announced it was to start using lowercase letters in forecasts by saying “NOAA’S NATIONAL WEATHER SERVICE FORECASTS WILL STOP YELLING AT YOU”