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TIL: ASL works just fine in microgravity.

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nWlEB TIL Measured by its longevity and popularity, the Cessna 172 is the most successful aircraft in history. First produced in 1956, more than 44,000 had been made as of 2015. It holds the world record for the longest manned non-stop flight of 65 days, set in 1959.
epWYn TIL that an octopus has 3 hearts and blue blood
yQdwe TIL 1960s, a sugar industry executive wrote fat checks to a group of Harvard researchers so that they’d downplay the links between sugar and heart disease. The low-fat, high-sugar diets that health experts subsequently encouraged are now seen as a main driver of the current obesity epidemic
6kJX TIL that during the rebuild of the World Trade Centre, a 30-min lunch break actually ran much longer as workers had to wait for elevators to ferry them up and down. To accommodate these workers, Subway created a mobile restaurant that moved up the building as they finished each floor.
aw40M TIL scientists have created a microparticle filled with Oxygen that can be injected into the bloodstream, enabling users to stay alive without breathing.