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TIL Astronauts often lose their fingernails after conducting spacewalks

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4XrKR TIL contrary to the popular myth that if a horse's legs were raised on a statue, the rider died in battle, there is no correlation between good position and manner of mortality
nedOB TIL about the “Three Finger Rule” - that people can generally only open their mouth as wide as three of their own fingers stacked on top of each other. This rule can help you know if food (such as a burger) is too large to comfortably bite.
Y7JW TIL the worlds smallest hooved animals are mouse-sized deer that weigh as little as 1.5 lbs.
9YJgX TIL 50 to 85 percent of oxygen on Earth comes from the ocean, mainly from phytoplankton.
BgWBW TIL that in 1977, European TV airwaves were taken over by an “alien” force, known as Vrillon, of the Ashtar Galactic Command, which delivered a psychedelic message of inner truth and peace. The incident has never been explained.