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TIL Crows can remember a dangerous human and share informations about them to other crows

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via reddit.com

wOn7 TIL, Dr. James C. Munch testified in court, under oath, that he had smoked marijuana, and it turned him into a bat. Dr. Munch was the “official expert” on marijuana for the U.S. government from 1938 to 1962
R7DXw TIL that AMBER Alert, which now stands for America's Missing: Broadcast Emergency Response, was originally named after Amber Hagerman, a nine year old girl from Texas who was abducted and murdered in 1966.
DawY TIL that during the Prohibition, grape juice mix was sold with the warning “After dissolving the brick in a gallon of water, do not place the liquid in a jug away in the cupboard for twenty days, because then it would turn into wine.”
b9vQ9 TIL In 1918, there was an outbreak of the 'Spanish Flu'. This was during WW1 and many countries had limits on what the press could write about, except Spain who was neutral. Thus, more reports came out about the flu from Spain causing people to think it was just happening there.
rBRd TIL that, due to the Doppler effect, a musical piece being emitted from a source traveling twice the speed of sound would be heard in correct time and tune, but backwards.