Video (VIDEO) Nara Institute of Science and Technology This video is under embargo. Please login to access this video. Caption Two molecular gears in action: Rotation of the first one is transferred to the next one. Credit Zhang et al., 2019, <em>Nat. Comm.</em>, 10:3742; http://creativecommons.org/licenses/by/4.0/ Usage Restrictions Credit Required. 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.