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TIL Metallica played a show in Antarctica for 120 scientists and contest winners. In doing so, they became the only band on earth to play on all seven continents.

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ADM7w TIL Plague doctors rarely cured their patients and weren't licensed medical doctors; instead, they served to count the number of people infected with the plague for demographic purposes.
rN1kw TIL A 2017 study found that the introduction of iodized salt in 1924 raised the IQ for the one-quarter of the population most deficient in iodine.
p8YrQ TIL The second largest Air Force in the world is the US Navy
p8aEA TIL in 1951, 650 British soldiers were being overwhelmed by 10,000 Chinese. When an American general asked for a status update, a brigadier responded "things are a bit sticky down there." No help was sent and almost all of the troops were killed because the general did not get the understatement.
QJKm9 TIL For seven generations, the Crane family have been the sole supplier of the paper that the U.S. Dollar is printed on.