Watch Water Droplets Travel Uphill

Science!

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Here it is in slow motion.

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The trick is that the surface is much hotter that the water's boiling point, so a layer of vapour forms underneath the droplet letting it keep its shape. It's called the Leidenfrost effect. Then the texture of the surface propels the droplets in one direction only.

Scientists at the University of Bath took advantage of this effect to make a maze that water droplets could navigate.

View this video on YouTube

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