› added 4 months ago

20

TIL that radium passivates by forming a nitride film, unlike most metals, which form an oxide film

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E7k7 TIL 20% of people can’t smell semen.
XEmnD TIL about a tiny Australian marsupial that is literally sexing itself into extinction. During a 3-week sex marathon session males have so much sex their bodies produce fatal levels of testosterone, causing immune system failure that result in internal bleeding, fur loss, ulcerations and gangrene.
rRxO0 TIL in 1911, physicist George de Hevesy suspected his landlady was bulking up his meals with leftovers; he proved it by sprinkling radioactive material over his dinner and detecting it in the next day’s portion
R7781 TIL that in 2013 the town of Nucla, Colorado passed a law requiring its citizens to own a gun.
WDDo TIL the soviet military mapped the entire world with an extreme accuracy. They created more than 1 million maps and some are still used today. It remains one of the most ambitious cartography project till today.