Ballistic Bacteria (IMAGE) University of Pennsylvania Caption Researchers tracked the motion of E. coli in fluids of different consistencies. Polymeric fluids produced more ballistic motion, meaning bacteria could swim farther in the same amount of time. Credit University of Pennsylvania 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.