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TIL that Genghis Khan slaughtered so many people that it lowered the carbon dioxide level

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78loP TIL the largest known Prime Number is 2^82,589,933− 1. It contains 24,862,048 digits, and a search for a potential larger Prime is ongoing.
Y7g0B TIL in the 1935 Prince Edward Island election, 42.1% of voters voted for the Conservative party. However, because of their geographic distribution across the province, the Liberals still won 100% of the seats in the Legislative Assembly, which was a first for the entire Commonwealth.
LwJQ TIL that in 1958 a man survived a mega-tsunami that had a run up height of 525m (1722 ft) because his fishing boat went right over it. He said he was looking down over the surrounding trees. This is the biggest tsunami on historic record by a looong way.
PY9vE TIL the original ending to Back to the Future would have Marty driving 88 mph towards a nuclear blast in a nuclear test site. However, Universal deemed it too expensive to shoot in the desert, so the lightning scene was instead shot at the Universal backlot and is shown in the final version.
a8vRN TIL about the Ham Sandwich Theorem, a mathematical theory stating every possible combination of any number of sandwich ingredients in any dimensional space can be cut in equal halves with one slice, regardless of each ingredient's location.