Sailing with Nerves of Glass (IMAGE) Fraunhofer-Gesellschaft Caption To measure the forces acting on the sail, researchers have fitted it with a web of glass fibers. Credit © Fraunhofer HHI Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.