The Secret of Gecko's Sticky Feet (IMAGE) American Institute of Physics Caption Geckos' feet are nonsticky by default, but they can activate "stickiness" through application of a small shear force. Credit Image by Bjørn Christian Tørrissen, Creative Commons License: <a target="_blank"href="http://creativecommons.org/licenses/by-sa/3.0/">http://creativecommons.org/licenses/by-sa/3.0/</a> Usage Restrictions This image may be used only with appropriate credit. <a target="_blank"href="http://creativecommons.org/licenses/by-sa/3.0/">http://creativecommons.org/licenses/by-sa/3.0/</a> License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.