Gripping Models (IMAGE) University of California - San Diego Caption Researchers found that the tail's square segments created more contact points with the surface that it is gripping when compared to a tail with round segments. Credit Michael Porter/Clemson University Usage Restrictions Please credit Michael Porter/Clemson University 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.