How to Make Water Flow Uphill Using the Leidenfrost Effect

In this 2013 video by Science Friday, researchers take advantage of the Leidenfrost effect to make droplets of water flow up an incline. The Leidenfrost effect occurs when a liquid is placed on a surface that is significantly hotter than the liquid’s boiling point. A layer of vapor prevents the liquid from touching the surface and thus boiling rapidly away—the vapor also allows the liquid to move across the surface with ease.

via The Awesomer

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