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TIL Slipknot’s third album contains almost zero profanity as a response to critics who said vocalist Corey Taylor over relied on swearing in his lyrics

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1amjr TIL: The Apollo Guidance computer was programmed in metric, but showed imperial values in the displays. Using metric meant fewer calculations thus optimizing the use of the limited processing power and the astronauts were used to imperial so that's what they saw on the display.
DGZJ TIL When Disney released the first trailer for The Lion King, they simply showed the entire “Circle of Life” opening sequence. Disney felt it was so powerful it worked as a trailer, and the movie went on to set box office records.
Ogy7 TIL the Aztecs once fed 200K people in inarable swampy land by creating floating gardens they farmed extensively
WxbY TIL that scientists are working on a nuclear fusion rocket which could reach Mars in 30 days.
AD9Vd TIL that redheads are more sensitive to temperatures, but less sensitive to pain in the skin than rest of the human population.