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TIL that Poland didn’t border any of the countries that it does now in 1989, without changing its borders.

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69vMQ TIL In Iceland, the tradition of Jólabókaflóð, or the "Christmas Book Flood," involves exchanging books on Christmas Eve and then spending the evening reading. This tradition stems from World War II when paper was one of the few commodities not rationed in Iceland.
nEX7 TIL: Women were excluded from the White House Correspondents Dinner until 1962, when JFK threatened to boycott unless they were allowed in.
BrBGe TIL that in World War II, the German troops used a tool that made their Sturmgewehr shoot curved bullets, called the Krummlauf. They came in angles of 30,45,60, and even 90, with 45 succeeding in numbers the most due to the bullets exploding out of the Krummlauf in the other angles.
xAQD TIL that Charles Darwin’s grandfather Erasmus posited early theories of evolution, wrote a book illustrated by poet William Blake, invented a steering mechanism later used in automobiles, opposed slavery and advocated formal education for girls.
DOdp TIL studies suggest working out 7.5 hours/week is the exercise benefits “sweet spot”, cutting risk of premature death by 39% compared to non-exercisers.