Nanotube Machine (IMAGE) American Physical Society Caption According to simulations, lengthwise compression of the nanotube causes the gear to rotate, converting linear motion to rotation. Credit Haiyi Liang and Moneesh Upmanyu, PRL 96, 165501 (2006) Usage Restrictions Contact the authors or the APS for photo permissions. 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.