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TIL of Yasuke, an east african man who came into the service of Japanese warlord Oda Nobunaga as a retainer in 1581 after being brought to Japan with Jesuit missionaries. When they first met Nobunaga had Yasuke's skin washed, believing it was ink only to realise that was Yasuke's natural skin colour

GYDoQ TIL: Research has shown that when speaking, individuals who have been congenitally blind and have thus never seen anyone gesture nonetheless make hand motions just as frequently and in the same way as sighted people do. In fact, they will gesture even when conversing with another blind person.
KN4B TIL that Hitler’s doctor injected him with a solution of water and methamphetamine saying that was which he called “vitamultin”. He kept a diary of the drugs he administered to Hitler, usually by injection (up to 20 times per day). The list include drugs such as heroin as well as poisons
VB5rG TIL that Andrew Carnegie funded an organization to simplify spelling in the English language. Teddy Roosevelt began using the reformed spelling in his official communications and tried to get the federal government to follow suit, but Congress unanimously voted to stop him.
4kmAb TIL half-moons on fingernails and toenails (lunala) disappear with age.
wLDoY TIL Gambler's fallacy, the erroneous belief that if a particular event occurs more frequently than normal during the past it is less likely to happen in the future. In 1913, in a game of roulette, the ball fell in black 26 times in a row, the probability of the sequence is 1 in 66.6 million.