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TIL That Napoleon demanded a method of communication that would not require light or sound. Therefore ‘Night Writing’ was developed as a tactile military code, but proved too difficult for Napoleon’s troops to learn and was rejected. Night writing became the basis for braille.

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xVjAw TIL that, in addition to Father Christmas, Icelanders are visited by the 13 Yule Lads (including Sausage-Swiper, Spoon-Licker, & Door-Sniffer), as well as their giant pet cat Jólakötturinn, who eats children who don't receive new clothes for Christmas.
oBmNK TIL in 2004, a man named Ashley Revell sold all his possessions and put his entire net worth of $135,300 on red at the Plaza Hotel in Vegas. The ball landed on Red 7 and he walked out with $270,600.
X0wVP TIL about Skywave, a phenomenon in which radio signals "bounce" off the Earth's ionosphere. This mainly applies to AM and short wave radio signals which is why they can reach further distances.
0wvZN TIL when the Vatican Archives published records on the Templar Order, it showed that the Inquisition had discovered the Templars were not heretics, but in fact a knighthood for homosexuals. The Pope decided to close the knighthood "for the good of the church" when this discovery was made.
p8vW8 TIL in the lead up to Midway, the US suspected that a Japanese target called "AF" is Midway. To test this, US Pacific Command instructed Midway to give a signal indicating that they're out of water. The Japanese, immediately signalled that "AF is out of water".