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TIL An inactive diamond mine in Russia (Mir Mine) is so deep, Helicopters can be sucked into it by downward airflow

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Oop7X TIL that in 1956 the US Navy, at the request of Icelandic fishermen, destroyed hundreds of killer whales with machine guns, rockets and depth charges.
7KxM TIL A chess grandmaster threw the final round of a tournament in protest of having repeatedly been made to play women. She turned down the chance to defend her women’s world title to play mixed matches and randomly drew 7 women out of 10 rounds. The 5 move loss is the quickest ever by a grandmaster.
6EAal TIL over a hundred years ago, virtually every American city had public streetcars that people took to work. That includes cities we don't think of as hubs for mass transit today, like Atlanta, Raleigh, and Los Angeles. Today, just 5 percent of U.S. workers commute via via public transit.
b9RD0 TIL Rootbeer is popular in the US, bot not in Europe, because the substance (methyl salycilate) that gives root beer its distinct flavor, is widely used in European dentist mouthwash.
pWl8 TIL that French grammarian Dominique Bouhours’s last words are “I am about to – or I am going to – die: either expression is correct.”