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. 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.