Geckos Are Lizards That Are Amazing Climbers

question 53

Essay

Geckos are lizards that are amazing climbers.A gecko can climb up a glass surface and stick to it with a single toe.Professor Kellar Autumn, along with his students and collaborators, have shown that each toe of a gecko has millions of micrometer-sized hairs and that each hair splits into hundreds of 200 nm tips that provide intimate contact with a surface.Careful measurements show that a million of these tips could easily support the animal, but it has far more.The toes stick well on hydrophilic and hydrophobic surfaces.Bending the hairs allows the gecko to detach.What kind of noncovalent force is involved in gecko sticking?

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