Mechanism details (IMAGE) PNAS Nexus Caption Scanning electron micrographs of the fully assembled mechanism shown in both retracted (fully armed) and deployed configurations. The hook assembly is shown in detail as well as an accompanying optical photograph of the same model, with a finger for scale. Credit Maquignaz et al. Usage Restrictions None License Original 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.