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TIL Leonard Nimoy fought to get pay equity for Nichelle Nichols on Star Trek in the 1960s

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4Krb TIL unclean vocals (screams, yells, shouts) commonly used in metal genres, originated in the Opera, with the first recognizable use being in Alban Berg’s Wozzeck.
KOe69 TIL National Dollar Day on August 8th commemorates the day Congress established the U.S. monetary system in 1786. In 1862, the United States printed its first dollar bill. It wasn’t George Washington face, The first dollar bill featured Salmon P. Chase, President Lincoln’s Secretary of Treasury.
epWd5 TIL Dalmatians became associated with firehouses in the 18th and 19th centuries because of their ability to protect firefighting horses, fend off street dogs, clear the way with barking, and guard the equipment.
YpPlZ TIL that we humans have been dependent since 1977 on the blue blood of horseshoe crabs to keep our medicines safe. The crabs have been 'bled' for a chemical which is used to test for bacterial contamination in drugs. Finally, pharmaceutical companies are committing to a synthetic version.
D1MnY TIL that the Queen actually has two birthdays- one that was determined by the commonwealth and changed to be the second saturday of June, and another that is her actual one which is the 21st of April. The birthday is changed in order to guarantee better weather for celebration