Figure. 1 (IMAGE) Tokyo Institute of Technology Caption Electron microscopy image of microbial cells which respire sulfate. Credit Photo credit: Guy Perkins and Mark Ellisman, National Center for Microscopy and Imaging Research Usage Restrictions The image may only be used with appropriate caption or 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.