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TIL factory workers were told to clean the paintbrushes on their lips while painting the self-luminating radioactive radium dials on watches in the 1920s.

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via reddit.com

rN4E4 TIL: F-35 pilots must keep their hair in the same shape as a new haircut may cause their custom made helmets to not fit correctly.
4XD6g TIL that the US gave hallucinogenic drugs to soldiers to make sure they are prepared to exposure to chemical warfare. Between 1955-75 the army used 7,000 volunteer soldiers to test LSD, nerve agents, irritants, and blistering agents. Some volunteers were asked to workout & do math while on LSD.
MeWmB TIL until the Anatomy Act of 1832 (UK) there weren't enough corpses for medical schools and body snatching proliferated to a point grieving families had to guard graves after burial. Robbers didn't steal jewelry/clothes as that was a felony punishable by death/transportation; a body was only a fine.
lVya TIL In 1948, A man was found dead on a beach in Adelaide and the words “Taman Shud”, torn from a book, in a hidden pocket. The rest of the book was found in a nearby car, with a mysterious code on a page only visible under UV Light. The code and the identity of the man has never been solved
oME TIL a student designed the RECYCLING logo & got paid out a whopping $2500.