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TIL the oldest known song dates from 1400BC

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w651 TIL Carl Sagan’s anatomically correct naked man and woman were censored on the Voyager spacecraft Golden Record because critics found the nudity offensive.
ew8g TIL Earth’s rotation is slowing at a rate of approximately 17 milliseconds a century, and the length of a day for the dinosaurs was closer to 22 hours.
xpbw TIL when the allies bombed Hamburg in July 1943, the unusually warm and dry weather conditions created “a vortex and whirling updraft of super-heated air which created a 1,500-foot-high tornado of fire, a totally unexpected effect.”
oRR1E TIL Brian O'Leary wrote his Ph.D. thesis on the physical properties of the Martian surface and was selected as a scientist-astronaut by NASA in 1967 for a potential manned Mars mission when it was still in NASA's program plan
OodQ7 TIL of Encephalartos woodii, a near-extinct tree with only a single surviving male specimen. Without any female specimens the only way to reproduce it is to clone the male.