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TIL that since 2010, ps3 uses an audio watermark algorithm to detect illegal movie copies. It can survive compression, re-encoding and microphone recording yet it is imperceptible to human hearing.

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Wka99 TIL that metal eyelets allowed for corsets to be tightened further than before in Victorian England. So much so it would displace organs.
0jRR Today I learned that the inequity seen in more attractive waiters earning higher tips is not the result of male customers bestowing financial favors on attractive waitresses. Rather, the primary driver (of this dynamic) is female customers tipping attractive females more than unattractive females
rP6y TIL that when Charles II died the autopsy stated that his body “did not contain a single drop of blood; his heart was the size of a peppercorn; his lungs corroded; his intestines rotten and gangrenous; he had a single testicle, black as coal, and his head was full of water.”
j69Wa TIL about Gilles de Rais, a leader in the French army during the Hundred Years' War, and a companion-in-arms of Joan of Arc was put on trial and eventually found guilty of the abduction, torture and murder of more than 140 children in attempt to summon a demon named Barron.
wB0E TIL that in 1909 two chemists invented an industrial process to harvest nitrogen from the air. Today, the nitrogen from that process keeps roughly 3.5 billion people alive.