Bacteria (3 of 3) (IMAGE) U.S. National Science Foundation Caption Seafloor bacteria on ocean-bottom rocks are more abundant and diverse than previously thought, appearing to "feed on" the planet's oceanic crust, according to results of a study reported in this week's issue of the journal Nature. Credit National Science Foundation 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.