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TIL only 9 US military officers have held the 5-star rank. It was created during WW2 because US officers were often commanding allied officers of higher rank. A 5-star officer cannot retire and remains on active duty for life. It was retired in 1981 on the death of General Omar Bradley.

PkdJ TIL El Duce (lead singer of The Mentors) claimed in an interview that Kurt Cobain had been murdered and that he knew the killer’s name. Two days later Hoke died after being hit by a train with no witnesses.
xVyb TIL a graduate student mistook two unproved theorems in statistics that his professor wrote on the chalkboard for a homework assignment. He solved both within a few days.
Wkow4 TIL that "Louis Le Prince" was actually the first person to invent a motion picture camera, 3 years before Thomas Edison, but was not able to publicly showcase the device as when he was going to retrieve it, he entered a train and was never seen again.
vgp8 TIL A North Carolina man owns the only known recording of Super Bowl I, as CBS and NBC didn’t save it. The NFL countered his $1 million offer for the taping with $30,000, then later refused to buy it at all, yet warned him he’ll face legal action if he sells it to anyone else.
DQ1LV TIL I learned about "Bombturbation", the cratering of the soil surface and mixing of the soil by explosive munitions, usually during warfare or related activities. Some places like Verdun in France (during WW1), were completely and almost irreversibly changed by this