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TIL :The The floating turd mystery that still haunts NASA

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8OVL TIL all competitors in the Olympics get a participation medal.
b9WJa TIL of Precordial catch syndrome, a condition where you get random harmless stabbing pains in the chest
D1YMV TIL alligators have permanently erect penises
LQrrP TIL 50yrs ago the Arecibo Message was sent into space to communicate human existence to potential extraterrestrial life.
N7kEP TIL building walls in curves takes less bricks