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TIL that Dr. Evan O'Neill Kane, who had removed his own appendix, was the first surgeon to bring music into the operating room

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E1xr7 TIL The McDonnell Douglas F-15 can reach 30,000 ft (9,100m) in 60 seconds and has a thrust-to-weight ratio that allows the aircraft to accelerate while flying straight up. It is also the only aircraft to ever shoot down a satellite orbiting in space.
6EPLZ TIL the town of Valmeyer, Illinois was so prone to flooding, that after a flood in 1993 the community decided to move the whole town two miles away onto a bluff to prevent further flooding.
78DeO TIL Al Copeland, the founder of Popeyes, in the early 1960s spend 10 years in the doughnut business before creating his first restaurant that sells chicken.
dDrM7 TIL The Ethiopian new year is celebrated on September 11.
PYmVw TIL about the Irukandji jellyfish, a small and venomous jellyfish, that lives off the Australian coast. A sting, which initially feels like a mosquito bite, escalates to "Irukandji Syndrome", causing pain, cramping, headaches, vomiting, anxiety, and an impending sense of doom.