Wyoming Drilling Site (IMAGE) University of Utah Caption A rainbow appears over National Science Foundation-funded drilling site in Wyoming's Bighorn Basin. In a study led by University of Utah geochemist Gabe Bowen, sediment cores drilled at the site revealed a global warming episode almost 56 million years ago resembled today's in terms of the size and duration of carbon releases to the atmosphere. Credit Elisabeth Denis, Pennsylvania State University. 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.