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TIL about “The Hum”- a global constant sound that’s making some people mad. Can you hear it?

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Y7Mrd TIL among the disintegrated remains of the Space Shuttle Columbia was the diary of Ilan Ramon, which managed to survive mostly intact. The diary detailed his first six days during Columbia's final mission.
Vn5Z TIL that Sudoku Can Save Photographers from Copyright Theft
JYdyj TIL a study reviewing 87 past research papers which suggested that drinking alcohol moderately has health benefits found that literally all of them were biased and/or poorly designed and/or pointing to positive effects that were unlikely in reality.
b9py7 TIL the longest piece of English literature ever created is a Super Smash Bros fan fiction. Started in 2008 this work in progress spans 222 chapters and is over 4.1 million words.
epvQL TIL the British entered their own cartridge into NATO's PDW trials, which sought to replace the standard 9x19mm Parabellum round. Competing with FN's 5.7x28mm round and H&K's 4.6x30mm was .224 Boz, a necked down 10mm Auto cartridge.