Fiber Orientations Visualized (IMAGE) University of Pennsylvania Caption Using a polarized-light-based system that can reveal the angles of collagen fibers in a ligament sample, the researchers have shown how groups of neighboring fibers changing their orientations in tandem prefigures the spots where failure eventually occurs. Credit University of Pennsylvania 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.