Trajectories (IMAGE) American Institute of Physics Caption These are trajectories of magnetotactic bacteria swimming the rotating magnetic field generated by the Smid et al tool. The bacteria were viewed using a light microscope. The bar in the lower right section of the photograph represents 100 micrometers. Credit Pieter Smid/Ludwig-Maximilians-Universität Usage Restrictions This image may be used only with appropriate caption and credit. 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.