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m15bp TIL sine and cosine waves are actually a spiral in 3D. The 2D version is just a side view of the spiral.
x6M6k TIL In the 1980s you could record a game off the radio, onto a cassette tape and play it on your computer
gM7KL TIL Apollo 13 was shot in “a hollowed-out, windowless, padded Boeing 707 jet that climbs to 30,000 ft. and then arcs into a steep dive, creating a 23-second period of weightlessness.” This plane is used by NASA for 0g training.
KYbvB TIL That Rosa Parks sued Outkast in 1999 for defamation
bEmQ TIL people who speak English with an accent, but sing without one, are simply singing in a way that comes naturally, which also just so happens to be the core of what many people consider an “American” accent.