Bones of Yellowstone (IMAGE) University of Chicago Caption This elk skull and other remains recovered during Joshua Miller's study of Yellowstone National Park are revealing details about the region’s ecological history. Miller published his findings in the March 28 issue of PLoS ONE. Credit Scott Rose Usage Restrictions News organizations may use this image in connection with reports describing Joshua Miller's research. 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.