十万个为什么·科学阅读30篇（3）
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How Do Geckos Stick to Glass Without Glue?
壁虎不靠胶水，怎么能在玻璃上爬行？
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Geckos have millions of tiny hair-like structures on their toe pads.壁虎脚垫上拥有数百万根微小的毛发状结构。
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Each hair splits into hundreds of even smaller tips called spatulae.每根毛发又分叉成数百个更细小的末端，称为 spatulae（铲状结构）。
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These ultra-fine tips get close enough to surfaces for weak atomic forces to act.这些超细末端能贴近物体表面，使微弱的原子间作用力得以生效。
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Together, these forces create strong sticking power — no liquid or glue needed.这些作用力共同产生强大附着力——无需液体或胶水。
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A gecko can lift one foot and walk upside down on smooth ceilings.壁虎能抬起一只脚，在光滑的天花板上倒立行走。
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Their toes peel off easily like tape, letting them move quickly without getting stuck.它们的脚趾能像胶带一样轻松剥离，从而快速移动而不被粘住。
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Scientists copied this idea to make reusable dry adhesives for space tools.科学家仿照这一原理，研制出可重复使用的干性粘合剂，用于太空工具。
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Even a small gecko can hold its full weight using just one toe pad.即使体型很小的壁虎，仅靠一个脚垫就能支撑全身重量。