Water Responsive Material (IMAGE) Advanced Science Research Center, GC/CUNY Caption A moth-shaped cutout made of regenerated silk continuously moves on a hand, driven by surface moisture. I Credit Darjan Podbevšek Usage Restrictions All Rights Reserved License Original 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.