Xenobot swarm activity (IMAGE) Tufts University Caption Xenobots exhibit cooperative swarm activity, in this case working together to gather piles of tiny particles. Credit Doug Blackiston, Tufts University Usage Restrictions None 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.