Skeletal Record (IMAGE) Oregon State University Caption Small mammal bones from Homestead Cave in Utah provide ecologists a fossil record of changes in this group of animals over thousands of years. Credit (Photo courtesy of Oregon 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.