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TIL that on the fourth day of Christmas my true love gave me “colly birds”, aka blackbirds, not “calling birds” until “calling birds” became more popular in the 1970s.

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rBRd TIL that, due to the Doppler effect, a musical piece being emitted from a source traveling twice the speed of sound would be heard in correct time and tune, but backwards.
Wkm09 TIL The Sopranos creators were often contacted by the FBI and told that actual mobsters, whose conversations were picked up by wiretaps, had plenty to say about the show. They considered the show's portrayal of the mob life so dead-on, they thought one of their own was was working on the inside.
KnOQ TIL Olivia Netwon-John is the granddaughter of Nobel physicst Max Born and she sang at his 125th birthday celebration in Germany. Although she has never met her grandfather, she often heard her mother speak highly of him
X0mlD TIL the highest-ranking officer of the British Royal Navy at the start of World War 1, was a German prince named Louis of Battenberg, who was made to resign and later abandon his German dynastic titles due to anti-German sentiment in Britain
ANYxB TIL each element on the Periodic Table corresponds to one solution of the main equation in the field of quantum mechanics & that the entire field of chemistry emerged from that single equation.