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TIL the "red zone and white zone" announcements at the beginning of "Airplane!" were performed by the same real-life married couple that recorded similar announcements at LAX around the time of the film's release.

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1o4X TIL The earliest form of RAM stored data as sound waves. Bits would be ‘thumped’ into a tube filled with mercury, then read by sensor on the other end. The computer was free to do other things during the relative eternity it took the bits moving at the speed of sound rather than the speed of light.
8XvV TIL the fedora tip meme guy was a character in freaks and geeks
WknvL TIL Breast cancer is sometimes incidentally found during cardiac nuclear stress tests because of how the isotopes are absorbed in the chest
4gNa TIL there are six Celtic nations recognized by the Celtic League: Ireland, Scotland, the Isle of Man, Wales, Cornwall, and Brittany
oVpR TIL: Swedish warship Vasa, it sank in 1628 and was recovered from the ocean in 1961 almost completely intact. This is the only remaining intact ship from the 1600’s. This ship is housed in The Vasa Museum in Stockholm Sweden. A museum built around the ship.