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TIL the shape of a lawn mowers blade creates lift which forces the grass to stick up, making it much easier to be cut by the next blade

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7rZwr TIL that E.T. was originally a horror movie titled Night Skies, which involved a crew of aliens attacking a family in their home. One of the aliens, who was less evil than the others, made friends with the family's son, and Steven Spielberg eventually dropped the rest of the film to focus on this.
wLmbP TIL There exists a weatherphenomenon called a "rainbomb" and it has killed 137 people on DeltaFlight 191 on August 2, 1985. The scientific name is "wet microburst" and now there are photos.
drpB TIL Hugh Trenchard, a British soldier in the Boer War was shot in the chest and spine, becoming partially paralysed, took up bobsledding as a pastime, and after a major accident regained use of his legs
nWBjB TIL that the idea that people harvest Adrenochrome from humans, subject of a wide-spread conspiracy theory, originated in Hunter S. Thompson's novel "Fear and Loathing in Las Vegas"
XeKD TIL that 600 years before Galileo, al-Biruni wrote that the earth rotates on its axis. Unlike Galileo, his ideas were accepted by religious scholars.