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TIL that in 1964, British Marines unknowingly consumed LSD and were instructed to carry out standard training exercises, so that the Army could determine the suitability of the drug to incapacitate enemy soldiers.

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x69bg TIL that one of the earliest hang gliders was invented in 1853 by George Cayley who created a slope-launched, piloted glider.
R7kA6 TIL that most Koreans do not use deodorant due to a gene called ABCC11, which prevents sweat from producing odor.
d8AJE TIL a USB drive becomes lighter as you begin to store more data on it
Wk9jY TIL: An exabyte (one million terabytes) is so large that it is estimated that 'all words ever spoken or written by all humans that have ever lived in every language since the very beginning of mankind would fit on just 5 exabytes.'
9DYB TIL Alan Shepard peed in his spacesuit moments before becoming the first American in space