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TIL our fingers and toes prune in water because of a response mechanism in our nervous system that has evolved to give us a better grip on wet or submerged objects.

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vPRGL TIL of in 1748, the first known artificial refrigeration was demonstrated by William Cullen. But the history of the ice makers begins with Oliver Evans, an American inventor who designed the first refrigeration machine in 1805 because Mr. Cullen never used his discovery for practices.
rR7b4 TIL the maze generation algorithm for the 1982 Atari game Entombed always makes solvable mazes just by looking at the 5 nearest tiles, and nobody understands why it works—it came upon a programmer when he was drunk
p89mO TIL Total Solar Eclipse helped prove Einstien right about Relativity, making him an instant celebrity.
9wVpX TIL that Isaac Hayes's, the voice of Chef from South Park, decision to leave the show was actually made by his entourage, all of whom were ardent Scientologists, and that it was made after Hayes suffered a stroke, leaving him unable to make such decisions on his own
oRGk8 TIL that the 1952 light heavyweight title boxing bout between Sugar Ray Robinson and Joey Maxim in New York was held in stifling heat. Referee Ruby Goldstein collapsed after the 10th round, and was replaced by Ray Miller. Robinson was unable to continue after 13 rounds due to heat exhaustion.