Tracking a Surface Wave (IMAGE) Duke University Caption The stresses caused by a leaky Rayleigh surface wave are tracked using a high-speed camera (left) and compared to new models of the phenomenon (right). The circular cracks these types of surface waves create were first seen in the windshields of supersonic jets flying through rainforests and could now be harnessed to break apart kidney stones. Credit Pei Zhong, Duke University Usage Restrictions None 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.