STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Gecko foot hairs. Coloured scanning electron micrograph (SEM) of hairs, or setae, from a gecko's (family Gekkonidae) foot. These hairs enable the gecko to cling to smooth surfaces by taking advantage of weak intermolecular forces, known as Van der Waals forces. Magnification: x1500 when printed 10 centimetres wide.
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