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1 .This is Scientific American 60-Second Science. I'm Clara Moskowitz. Got a minute?
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2 .As is well known, geckos sell car insurance.
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3 .But they're also famous for their extremely adhesive feet, which can keep them stuck to walls and even ceilings.
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4 .Archimedes wondered how they do it.
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5 .Geckos can also easily loosen their grip and break into a dash, which has flummoxed physicists.
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6 .But scientific stick-to-itiveness finally found the on-off switch.
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7 .Geckos' toes are covered in thousands of tiny hairs called setae.
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8 .These setae can bend to make contact with all the grooves and crevices in a surface.
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9 .To adhere, the setae rely on small electromagnetic attractions between molecules called van der Waals forces.
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10 .Researchers created mathematical models that revealed that the default mode for gecko feet is non-sticky.
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11 .To activate the grip, the lizards extend and angle their setae to create millions of contact points with a surface.
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12 .The research is in the Journal of Applied Physics.
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13 .Scientists would love to create synthetic adhesives based on the gecko trick.
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14 .Perhaps by harnessing the power of setae, robots could climb walls, and stick or unstick without expending much energy, just as the gecko does.
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15 .Thanks for the minute, for Scientific American 60-Second Science. I'm Clara Moskowitz.
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