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TIL after Galileo discovered the 4 largest moons of Jupiter, he sought the patronage of the Medici family and proposed naming the moons after their 4 sons. However, the names Io, Europa, Ganymede, and Callisto—based on the names of Zeus’ lovers—were later popularized by the astronomer Simon Marius.

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loOma TIL that in 1994, the Surgeon General of the U S, was fired for saying masturbation is "part of human sexuality, and perhaps should be taught."
4ZjR TIL that Teddy Roosevelt suffered a detached retina in 1908 after becoming blind in one eye due to a boxing injury in the White House. He later switched to jiu-jitsu and became a black belt.
R5WKj TIL Hershey's miniatures were originally made up of the Hershey bar, Krackel, Mr. Goodbar, Bitter-Sweet (now Special Dark), and Nougat-Almond which came in a blue wrapper. Nougat-Almond was removed during WWII due to rationing.
696BW TIL I learned early Alabamians really loved their 'cola'.
LkJWd TIL the British Royal Navy allows sailors to have facial hair, but only if they can grow a "sufficiently thorough beard" within 14 days.