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TIL An American firm wrote to the Beatles asking if they could market the Beatles' bath water at a dollar a bottle. They refused the offer.

LQyy0 TIL that the psychiatrist Henry Cotton would sometimes extract all of a patient's teeth as he believed infected teeth to be the cause of psychiatric disorders. If that didn't work, he'd remove testicles, ovaries, gall bladders, stomachs, spleens, cervixes and colons.
VBogm TIL The exact origins of paper airplanes are lost in the mists of ancient early civilization, but evidence points to folded paper gliders being developed and refined concurrently in Ancient China and Japan sometime around 500 BC.
JEj4 TIL the Slinky was conceived of in 1943 by Richard James. While working at a shipbuilding company, he watched a torsion spring fall off a table and flip end over end. His wife came up with the name Slinky after looking through the dictionary for a word that described the motion of the spring.
xV96g TIL: The phrase "[murdered] in cold blood" doesn't refer to someone being cruel. It refers to the killer having had time to think over the crime and still do it in a calculated way. As opposed to doing it in the "heat of passion", their blood had time to cool before they committed the crime.
RZQ6 TIL in 1915 a group of 112 Belgian prisoners asked the German commandant permission to organize a bike race. Under strict rules and heavy oversight, the racers escaped from Belgium simply by continuing after they crossed the finish line.