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TIL that a urinal is a sanitary plumbing fixture for urination only.

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0wYDN TIL that “California here I come” is officially public domain.
oRpNA TIL an indigenous man, whose family lived in Hong Kong before 1898, gets free land from government to build his home.
16EpD TIL that quantum field theory predicts the energy density of empty space to be about 10⁸ GeV⁴. In 2015 it was measured to actually be about 2.5 × 10⁻⁴⁷ GeV⁴, which is smaller than predicted by 1 octodecillion percent. This has been called "the worst theoretical prediction in the history of physics".
lmeK TIL Thomas Hicks ran the 1904 Olympic marathon while drinking a mix of strychnine, egg whites and brandy which made him hallucinate and become sick. His trainers had to carry him over the finish line but he was still declared the winner, with the slowest gold medal time in Olympic marathon history.
6ro8 TIL Ulysses S. Grant wrote his memoirs after being commissioned by Mark Twain. After his presidency, Grant had lost all his savings to a shady investment partner, leaving his family nearly destitute. Grant died days after finishing, but sold over 300,000 copies and earned his family over $450,000.