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TIL - during a test flight in 1961, a DC-8 became the first passenger jet to break the sound barrier and go supersonic. Chuck Yeager was the chase plane pilot.

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8eeM4 TIL Bach wrote the Brandenburg Concertos in 1721 as part of a job application to the Margrave, which he never received a reply. The concertos were unpublished until 1850 and almost lost again during WWII
KONwB TIL the three point line didn't start in the NBA until 1979, 1986 for NCAA and 1987 for high school.
ANPPx TIL Trains have tanks of sand with tubes that shoot sand under each wheel to create friction so the train accelerates more efficiently
Nj9P TIL of blind sight, a type of blindness where the eyes are still functional. As a result, the individual is not physically aware of their surroundings, but their brain can subconsciously see and avoid obstacles.
xVVJ1 TIL at the 1964 World's Fair, IBM passed over their computers to showcase the electric typewriter, which they thought would be more innovative and revolutionary.