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TIL that The Lone Ranger was most likely based on real life U.S. Deputy Marshall Bass Reeves - the first Black U.S. Deputy Marshal west of the Mississippi

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loYXA TIL Steven Hawking Megathread.
R7YP1 TIL about the blue men of the desert, the Touareg people. Their indigo colored clothing stains their skin blue and the women in their matrilineal society enjoy a high status
XEGVk TIL Rachmaninoff created a piece based on an inversion of the melody of a Paganini's theme, by flipping the melody "upside-down", reversing its contour, so (almost) all the rising parts become falling parts.
LkZ10 TIL cryptanalyst Elizebeth Friedman broke 4,000 codes during WWII and brought down a Nazi spy ring by cracking an early version of the Enigma machine with pen and paper
E1OVo TIL about Richard Feynman who taught himself trigonometry, advanced algebra, infinite series, analytic geometry, and both differential and integral calculus at the age of 15. Later he jokingly Cracked the Safes with Atomic Secrets at Los Alamos by trying numbers he thought a physicist might use.