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TIL that the term Gaslighting comes from a 1938 play and a 1944 film, in which an abusive husband Gregory manipulates his wife Paula to make her feel as if she has gone mad. One of the ways he does this is by dimming and brightening the gaslights, all while convincing Paula that its all in her head.

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wLOG6 TIL that when hooked up to a brain scanner, expert level meditators are in a constant gamma wave brain state. Most people only experience a few moments of gamma brain waves at times of great joy or accomplishment. When meditating on compassion their gamma levels jump 700-800%.
4kkRX TIL About retired South Korean boxer Byun Jung-il who lost his bantam weight match at the Seoul Olympics in 1988. Upset by the loss he refused to leave the ring for over an hour to the point that officials turned out the lights in the auditorium until he left.
eGxg TIL that the fatality rate was so high for airmen in the WWII years of 1942-1943, it was statistically impossible for a flight crew to finish a 25-mission tour in Europe
LbNv TIL NFL football offensive lineman John Urschel has been published in several complex mathematics journals.
N7Vr6 TIL that Diphenhydramine, sold under brand names Benadryl, Nytol, ZZZQuil, Unisom, and others can cause extremely realistic hallucinations and confusion at high doses. Most users report hallucinations of spiders, conversations with people that aren't there, and a lingering impending sense of doom.