This guy put fluidised sand in a hot tub and it is utterly mesmerising

We all knew science was cool, we just didn’t know how cool.

YouTuber Mark Rober demonstrated how adding air to sand in a certain way causes the sand to look and act like a fluid. The next logical step was to fill a hot tub with the stuff.

Not only does this video teach you about industrial application of science (fun!) — you also get to watch him giving his nephews a fright when he hides under the sand only to burst out.

Science!

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