Bouncing balls on a hot pan led to a new physics discovery: Water droplets float in a hot pan because of the so-called Leidenfrost effect. Now, physicists have discovered a variation: the elastic Leidenfrost effect. It explains why hydrogel balls jump around on a hot plate making high-pitched sounds

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Bouncing balls on a hot pan led to a new physics discovery: Water droplets float in a hot pan because of the so-called Leidenfrost effect. Now, physicists have discovered a variation: the elastic Leidenfrost effect. It explains why hydrogel balls jump around on a hot plate making high-pitched sounds