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TIL about Harris Wofford, a former United States senator who, in his youth, founded a student movement for the creation of a world government. It had grown so large by the time he was 18 that Newsweek predicted he would become President one day.

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d8YmZ TIL that only specific types of sand are useful in important building materials like concrete. This has creates a shortage of sand in some areas leading to black markets for illegally mined sand run by sand mafias and sand pirates.
NXwJ6 TIL the photo of Salvador Dalí jumping and painting while water and live cats fly through the air took 5 hours and 26 tries because they couldn't get the timing right. The "floating" objects hung from wires or were held up off-camera. Dalí’s canvas frame was empty in the pic; he painted it in later.
D1RoY TIL of One of America’s great rags to riches stories and a pioneer not only for women but also African Americans, Madame C.J. Walker blazed a path as the first black woman millionaire and is argued as the first self-made woman millionaire in the U.S.
Oo8VL TIL of the Gell-Mann amnesia effect, coined by Michael Crichton after discussions with Nobel-Prize winning physicist Murray Gell-Mann, which defines the idea that, "I believe everything the media tells me except for anything for which I have direct personal knowledge, which they always get wrong."
BgoZk TIL the techno nightclub "Toffler" in Rotterdam is a converted pedestrian tunnel, and features a hydraulic DJ system that moves back and forth throughout the night. It was named for futurist Alvin Toffler.