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" ... When gecko feet are magnified, the surface reveals a forest of microscopic hair-like structures known as setae. On an individual level, each of these hairs weakly interacts with any surface through a small short-range electrostatic force known as a Van der Waals force. Working alone, one hair would be attracting the gecko's foot to the surface with such a small force of attraction that it would fall straight off the ceiling. However in vast numbers, the individual weak attractive forces between the hairs and the surface, and the inherent increased surface area of interface between the gecko hairs and the surface add up to create a mighty grip for the gecko. ... "