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TIL that Mileva Maric, Albert Einstein's first wife, was one of the first female physicists in the world. There is evidence she contributed greatly to Einstein's research, including his theory of special relativity. Einstein once said, "She solves for me all my mathematical problems."

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d8kQK TIL that in the US, Americans would raise their right hand in an upward direction (similar to a Nazi salute) when they recited the pledge of allegiance. It was repealed by Congress in 1942 (for obvious reasons) to have the right hand over the heart as we know it today.
JYla1 TIL about the Carthusian Martyrs. These men refused to accept Henry VIII as the Supreme Head of the Church in England and were brutally killed because of it. The English authorities under Thomas Cromwell killed and harrassed the Carthusians until they were finally able to loot their monastery.
1a4dV TIL that United Airlines operated daily "men only" flights between New York and Chicago from 1953 to 1970
R54Nj TIL in 1967 a man named Thomas Jolley fled the US to Canada and renounced his citizenship to avoid being drafted in the Vietnam War. A few months later he returned to the US and was ordered deported, but Canada refused to accept him back. He spent the rest of his life in the US as an illegal alien.
4XlYR TIL On June 7th, 1692 the pirate city, Port Royal, in Jamaica was rocked by a massive earthquake that shook the city into the ocean, leaving 2,000 souls burried under sand and brick. Shortly after the quake, a tsunami flooded what was left.