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TIL the 13th amendment bans slavery 'except as punishment for a crime.'

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14e7 TIL Nazi Germany produced Chlorine Trifluoride for use as a dual purpose incendiary and poison gas in WW2. ClF3 causes almost anything to spontaneously explode on contact, including wood, concrete, sand, gravel, glass, asbestos, water, and of course flesh.
XEPYD TIL about the G.I Joe Fallacy, named so by two women professors at Yale, means that knowing is not half the battle. But knowing that the G.I Joe Fallacy is a fallacy is less than half the battle.
YdNd TIL the fastest that humans have ever travelled on land is 760MPH (ThrustSSC). In the air, 4520MPH (X-15 Jet). And in space, 24,791MPH (Apollo 10 upon re-entry).
v1k4D TIL, there are only 3 countries in the world that still use the Imperial System. These countries are Myanmar (or Burma), Liberia and of course, The United States of America.
1PED TIL that “penguin shit is like water i.e. not viscous” and that a penguin can shoot shit with a power of 4600 pascals!