Yellowstone National Park (IMAGE) Woods Hole Oceanographic Institution Caption Peter Barry and colleagues collected volcanic gas samples in Yellowstone National Park that were analyzed as part of this study. Credit (Photo by Peter Barry, © Woods Hole Oceanographic Institution) Usage Restrictions with 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.