Web in Tension (IMAGE) Proceedings of the National Academy of Sciences Caption Hyptiotes holding its web in tension. Anchor line on left, trap line (connected to main web) on right. Credit S.I. Han 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.