Dung Research (image) Northern Arizona University Share Print E-Mail Caption Jim Mead cradles a box of 23,000-year-old archived bison dung that came from a cave in southern Utah. Mead, director of NAU's Laboratory of Quaternary Paleontology, is an expert on researching dung for clues about ancient life. Credit Photo by Diane Rechel Usage Restrictions None Share Print E-Mail 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.