Life on Mars (3 of 3) (IMAGE) University of Cincinnati Caption A UC analysis using a secondary ion mass spectrometer reveals elements such as gallium associated with bacteria found in silica deposits in Yellowstone's geyser basin. Credit Andrew Gangidine/UC 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.