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Ex NASA Engineer Makes Everyone Freak Out When He Turns Sand Into “Liquid Soup”

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Former NASA engineer Mark Rober has found a way to make science just as (if not more) entertaining as Bill Nye did – by making sand behave like water. Not only did he document the entire process, he even filled his hot tub to have fun with it, and explained everything in an easily understandable and humorous manner along the way.

In his entertaining video, Mark explores what is known as fluidized beds, “a physical phenomenon occurring when a quantity of a solid particulate substance is placed under appropriate conditions to cause a solid/fluid mixture to behave as a fluid.” To make sand ripple and bubble like it’s a liquid, Mark used air. Basically, by blowing air into the bottom of a container of sand, he increased the space between individual sand particles, reducing internal friction and allowing the particles to move around more freely, the way they would in a liquid.

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