fluidization
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What Kind Of Sorcery Lets People Swim In This Sand-Filled Hot Tub?
Video: You can try as hard as you want, but you’ll never be as cool an uncle as ex-NASA JPL engineer Mark Rober. Using elaborate experiments, he makes learning about science even more entertaining than Bill Nye did, and his latest invention is a sand-filled hot tub that somehow still behaves like water you can…