Contact Angles at Different Stages (image) American Institute of Physics Share Print E-Mail Caption Contact angles at different stages -- top: spreading; bottom: retracting. Credit Simeng Chen Usage Restrictions This image may be used only with appropriate credit. Share Print E-Mail 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.