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TIL a policeman William Potts invented the first tri-colour, four-directional traffic signal in 1920 in Motor City (Detroit).

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8JAK TIL in 1943, the LAPD allowed white servicemen on break from war to beat, strip, and urinate on Latino boys aged from as young as 11 in order to let out their frustrations at the “hoodlum” culture cultivating in LA.
vDE7 TIL that some Syrian rebels are using the Sturmgwehr 44, an assault rifle produced in Nazi Germany in late WW2 and which can be worth up to $30'000 in the US
WMXY TIL zeppelins and blimps are different things, zeppelins have a rigid metal skeleton, whereas blimps do not.
nyRP TIL That modern tortoises’ ancestors moved out of the sea (fish to land reptiles), then back to the sea (early turtles), then back to the land again as tortoises.
XEXbj TIL da Vinci was given a vineyard as payment for making The Last Supper, which was bombed in WW2, and the DNA of those vines is being used to recreate the wines he had