Jumping beans’ random strategy always leads to shade — eventually

Given enough time, jumping beans will always find their way out of the sun.

Jumping beans, which are really seed pods with twitchy moth larvae inside, hop around in a way that — if they live long enough — is guaranteed to eventually land them in the shade, researchers report in a study to appear in January in Physical Review E.

When a jumping bean finds itself in a sunny spot where it might overheat and die, the moth larva will twitch to make the bean jump a short distance. “If I’m a bean and I exist outside of the shade,” says physicist Pasha Tabatabai of Seattle University, “all

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