Michael Shafer and Diego Higueras-Ruiz (IMAGE) Northern Arizona University Caption NAU mechanical engineer Michael Shafer and graduate student Diego Higueras-Ruiz conducting a visual inspection of their new compliant robotic arm actuated with cavatappi artificial muscles. Credit Northern Arizona 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.