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TIL that D.W. Griffiths, who made the racist pro-KKK film “The Birth of a Nation”, responded to his critics with subsequent films that preached social justice and the first ever movie about an interracial love story.

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J1K94 TIL Mars sometimes hums. Scientists aren't sure why.
ANkVB TIL native americans were the first people to turn raccoon body parts into hats and european pioneers copied the fashion
6EkoY TIL of Research during 1950s all-male combat aircraft assignments revealed that a woman's voice was more likely to gain the attention of young men in distracting situations. Joan Elms voice was used for the automated voice warnings for Convair B-58 and was named "Sexy Sally" by the pilots.
kJAAg TIL in December 1967, then sitting Australian Prime Minister Harold Holt went missing while swimming and was never found. Shortly after, a community swimming pool in Melbourne was named after him...
V8Dp TIL A pink pigment exists that is so pink its true color cannot be captured by most cameras or displayed on a computer monitor