Thomas Gregor, Princeton University (IMAGE) Princeton University Caption Research by Thomas Gregor, an assistant professor of physics at Princeton, and others is shedding light on the molecular basis of collective behavior, seen throughout nature from geese to fish to amoebae. The researchers have found strong evidence pointing that collective behavior can arise in cells that initially may not be moving at all, but are prodded into action by an external agent such as a chemical. Credit Princeton University, Office of Communications, Brian Wilson 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.