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TIL the word Dollar is the Anglicized version of the German word Thaler, meaning from the valley. Thaler is the shortened version of Joachimthalers, a mine town in the Czech Republic (formerly Bohemia) where silver coins were minted.

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P1nVO TIL you can have a negative magnitude earthquake. Magnitude calcs are based on logarithmic scale so a ten-fold drop in amplitude decreases the magnitude by 1. If an amplitude of 20 mm as measured on seismic signal corresponds to a magnitude 2 earthquake then 1000 times less (0.02 mm) is mag -1.
OGklg TIL the heiress to the Brach’s candy fortune disappeared in 1977 (and was presumably murdered) because she threatened to expose the “Horse Murders Scandal,” in which expensive show horses were killed to collect insurance money
GYgEN TIL that the United States invaded Canada in 1812. Former President Thomas Jefferson predicted that the "acquisition of Canada (..) will be a mere matter of marching", however, it went terribly, after a few months the entire Michigan territory had fallen.
jNKrR TIL: Koshik, an elephant in a South Korean zoo, learned to imitate human speech by sticking its trunk in its mouth
E1ReV TIL that Americans used the Hitler Salute before Hitler