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TIL that DARPA developed an aircraft that reached speeds between Mach 17 and Mach 22

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OYLa TIL That Gorilla Glass was invented in 1952 and the idea of using it was shelved until 2005.
9wKGB TIL that Elena Lucrezia Cornaro Piscopia, a Venetian noblewoman, was the first woman who earned the degree of "doctor of philosophy". However, Catholic church and the University of Padua refused to get a degree in theology, which she originally wanted. She died six years later.
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