VOLKER STEGER / SCIENCE PHOTO LIBRARY VOLKER STEGER / SCIENCE PHOTO LIBRARY
Gecko locomotion study. Gecko (family Gekkonidae) climbing a non-stick vertical track (blue). A high speed camera is used to monitor the animal's locomotion. The surface of gecko toes are lined with microscopic hairs (setae and spatulae) that create weak intermolecular forces known as van der Waals forces. These forces are strong enough to allow the gecko to stick to any surface. When climbing, the gecko's toes open out from a curled position on contact with a surface, then unpeels it's foot when moving on. This uncurling and peeling action can be produced up to 15 times per second, enabling the gecko to move rapidly. Photographed in 2005 at the PolyPEDAL Lab, University of California, Berkeley, USA.
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