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    Alexandra Bruce

    Some of nature’s most ingenious tricks rely on surface structures built on a tiny scale — tinier than a human hair.

    Spider-man has hooks on the tips of his fingers that let him climb walls. Could real-life humans accomplish the same thing?

    Geckos have a nearly limitless ability to climb. Their feet don’t appear sticky to the touch. Amazingly their feet can stick and unstick up to 15 times per second.

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