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TIL that guitar god Eddie Van Halen once did a soundtrack for a porn movie

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OGNaa TIL that "Blackboard Bold" (the style of writing used to represent number sets in maths, e.g. ℕ, ℚ, ℝ, or ℤ) only first emerged in the 1950s due to people "double striking" letters on a typewriter to make them bold. It subsequently got into maths in the 70s and onward.
mxXMx TIL that 1.) cannabinoids such as THC and CBD protect hemp and marijuana plants from UV rays much like sunscreen protects human skin from UV rays and 2.) the sails that carried European colonizers across the world are made from the hemp fiber.
ADL14 TIL that the two most distinctive features of the 'Death Star' in Star Wars—its crater-shaped 'superlaser' and the 'trench' around its circumference—were actually the combined features of two of Saturn's moons, Iapetus and Mimas.
5A4D TIL that Pacific Rim’s “Gipsy Danger” is not spelled “gypsy” because it’s named after the de Havilland Gipsy, a plane engine invented in 1927.
XE848 TIL Chicken tenders are a real part of the chicken; they are muscles attached to the underside of each breast