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TIL that the coldest temperature in the universe, as far as scientists can tell, occurred on Earth. In 2003, physicists at MIT reduced the temperature of a cloud of sodium molecules to 810 trillionths of a degree F above absolute zero.

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4XKYN TIL that although GPS is free for the world to use, it costs $2 million per day to operate. The money comes from American tax revenue.
8woL TIL that there is a town Honduras where once a year, hundreds of small silver fish rain from the sky. Locals are stumped on where the fish come from or why the fish are blind.
gMynb TIL the chess kid from the "Final Boss" meme didn't freak out and actually played a decent game against a champion player.
Oo9Y1 TIL Aleister Crowley infiltrated a pro-German propaganda newspaper in NYC during WW1 that was trying to keep America neutral. His incendiary writing helped undermine the propaganda movement and may have contributed to America joining the war.
xYBw TIL: If you’re a man and pee on a pregnancy test and it’s positive, you probably have cancer.