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TIL that a 2006 study concluded that prehistoric predators had excellent vision, surpassing modern birds of prey. Compared to a bald eagle (whose vision is 4x better than ours), Tyrannosaurus rex had eyes that were 13x as precise as a human’s eyesight, meaning it could see prey from 6 km away.

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0wpdM TIL in the 1940s the musicians of America went on strike against major recording companies. Eventually, the major labels ran out of back catalogue to release and settled with the musicians, but the years without royalties effectively ended the big band era.
OM7g TIL that in 1835 Richard Lawrence attempted to assassinate President Andrew Jackson. When both of his pistols misfired, Jackson proceeded to beat Lawrence with his cane, and was then aided by Davy Crockett.
78Mnp TIL air vents are typically placed below windows
yVoKp TIL there's a species of fish (the Devils Hole pupfish) whose entire native range is a portion of a single underground pool in Death Valley.
5Zrr TIL of the one-electron universe postulate, proposed by theoretical physicist John Wheeler. Its hypothesis is that there is only one electron in existence that is constantly moving throughout time