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TIL that US Navy Captain Mad Jack Percival holds the unique distinction that his first naval ship, HMS Victory, and his last, USS Constitution, still exist as the oldest commissioned warships and national shrines for their respective nations.

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D1d6e TIL that the famous Law and Order sound effect, 'The Clang' is an amalgamation of nearly a dozen sounds, including an actual gavel, a jail door slamming, and five hundred Japanese monks walking across a hardwood floor.
ANoQd TIL The Crypt of Civilization is a time capsule room that was sealed in 1940 and won't be opened until the year 8113.
Eg0xV TIL NASA's crawler transporter that's used to move rockets from the assembly building to the launch pad gets 32 feet per gallon (165 gal/mile) from its 5000 gallon capacity diesel fuel tank
7880X TIL the first modern chain letter was written in the 18th century, with predecessors to the modern chain letter existing as far back as the 9th century
4X8ow TIL that in 1964 the FBI sent Martin Luther King Jr. blackmail tapes and an anonymously written letter that attempted to convince him to commit suicide