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TIL that Queen Elizabeth II was a truck mechanic in the army

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jeGQ TIL There is a type of shrimp which has the hardest “punch” of any animal, approximately the same acceleration as a .22 caliber bullet. They have been known to break through aquarium glass.
eprQ6 TIL that Robinson arithmetic is a system of mathematics that is so weak that it can't prove that every number is even or odd. But it's still strong enough to represent all computable functions and is subject to Godel's incompleteness theorems.
MG8B TIL Uday Hussein, Saddam’s son, murdered his father’s personal valet and food taster with an electric carving knife in front of dinner guests at Suzanne Mubarak’s birthday party for introducing his father to his second wife.
nWoQo TIL: 70% of hearing parents of deaf children never learn sign language.
QJXME TIL that in Sweden you agree with someone by sucking in air. In Sweden (and Norway), to show you’re on the same page as someone, you make a sharp sucking noise instead of saying "I agree" or nodding. It’s their way of letting you know they’re listening without interrupting the flow of conversation.