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TIL: There are hairstyles to trick camera facial recognition algorithms.

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69XPw TIL that after John III Sobieski of Poland-Lithuania defeated the Ottomans at the Battle of Vienna in 1683, the Kangxi Emperor of Qing China wrote an eulogy praising the Polish king. John III Sobieski later sent a portrait of himself to Kangxi.
r9y TIL In Victorian times, a slang term for a prostitute was “blowsy”. At the same time, “blow” was slang for ejaculation. Consequently, by the 1930s, the act of fellatio came to be known as a blow job
1aV07 TIL the quietest place on Earth is in a small studio in Minneapolis, Minnesota. At -13 dBA it’s so quiet you can hear the internal workings of your body.
1aWEd TIL the US Navy replaced expensive and clunky periscope controls on submarines with Xbox 360 controllers, which reduced training time from hours to minutes.
a84Zo TIL about Bob Fitzsimmons, boxing's first three-division world champion. He is the first middleweight champion to win the heavyweight title and has the Guinness world record for being the 'lightest' heavyweight champion, weighing in at 165lbs when he won the title.