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TIL an Iranian F-4 Phantom was attempting to shoot down a drone. The drone was being escorted by an F-22 Raptor which is a stealth fighter. The F-22 flew underneath the F-4 to examine it's munitions all without the F-4 noticing. The F-22 then told the F-4 "you really ought to go home", and it did.

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ep7DJ TIL The first house in Cleveland to have electricity got its power from the first automatic electric turbine. The turbine was built in 1888 for the home of Charles F. Brush and provide continuous power for 20 years.
OoZg1 TIL about Henry Rathbone, a Major in the Union Army who was with President Lincoln at the time of his assassination in Ford's theate. Despite being stabbed and slashed by John Wilkes Booth, he tried to apprehend the assassin and escorted Mary Lincoln to her husband, later passing out from blood loss
dDXL7 TIL about some US Marine named Charles Brown who received the Medal of Honor in 1872, but deserted in Shanghai before he could receive it.
E1mYx TIL in 1793, Thomas Jefferson requested a 1kg copper cylinder from France, to be used as a weight standard in adopting the metric system in the United States. The ship carrying the copper was blown off course into the Caribbean, where it was looted by pirates.
5VOKp TIL about Henry Cotton, an asylum director who believed that all insanity was caused by sepsis in other parts poisoning the brain, leading to widespread amputation of his patients' colons, teeth, reproductive organs, and even stomachs in order to "cure" them, with as many as 45% dying as a result