Legendary Leapers (IMAGE) Brown University Caption The Northern leopard frog loads its tendons before leaping. "Muscles alone couldn’t produce jumps that good," said graduate student Henry Astley. Credit Mike Cohea, Brown 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.