Figure 2 (IMAGE) Tohoku University Caption Results of behavioral (top left) and simulation (bottom left) experiments in (a) a case without pegs and (b) a case with pegs. The worm ball in (a) moved back and forth faster than that in (b). (c) Magnified view of the worms. Credit Taishi Mikami et al. Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. 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.