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TIL that the lyrics to Michael Jackson's "Smooth Criminal" were inspired by the CPR doll Resusci Anne, a dummy used to teach people how to properly perform CPR. Trainees are taught to ask "Annie, are you OK?" while performing CPR on the dummy.

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1aBRP TIL there is a very rare type of insomnia when you just don't sleep. This leads to insanity and death within 18 months.
oBVNL TIL Louis Zamperini was an olympic athlete, and a bombardier in the US Air Corps. He survived two crash landings, was afloat on a raft for 47 days in the ocean, survived 'Execution Island' in Japan, and was horribly abused in a POW (Prisoner of War) Camp. Louis lived for 97 years, and died in 2014.
e0xWE TIL Wine Glasses Are Seven Times Larger Than They Were In The 1700s
kE05 TIL that hitting objects with your penis (flacid, half erect) in The Netherlands has it’s own word. Swaffelen. (Swaffeling)
ZVDp TIL that in 2009, there was a mass shooting at an LA Fitness in Pittsburgh. There was little national press, even though it was a hate crime against women, and the shooter kept online diaries chronicling his plans for the attack.