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TIL baseball legend Ted Williams was wingman for astronaut legend John Glenn in the Korean War

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ne4PB TIL The guy who shot down a F-117 Nighthawk over Serbia is now running a bakery, and him and the pilot have become friends.
MeLAW TIL soundtracks to movies were included as “optical sound” on the edge of film reels starting in the 1920s. Usually the density or width of the signal was read by a photodiode and turned into sound with some delay to match the picture on the screen.
xp11 TIL that the SR-71 was able to maintain its heading within 1,000 feet at Mach 3 by using a navigation system that tracked a series of 61 stars using a sensor capable of detecting them in broad daylight.
WknJ9 TIL that the colour Indigo means "India Dye". It was produced from a plant which grows in South Asia. This was highly profitable for the colonial trade by the East India Company.
oBn9K TIL that Alice Cooper was originally the band’s name and that Cooper now pays an annual license to his former band mates to use the name Alice Cooper