3D Jawbone (IMAGE) University of Alaska Fairbanks Caption A 3D rendering shows fossilized teeth and jaws belonging to <em>Unnuakomys hutchisoni</em>, a newly discovered marsupial that lived on Alaska's North Slope 69 million years ago. Scientists found its tiny teeth, which are about the size of a grain of sand, at a site along the Colville River. Credit Jaelyn Eberle image 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.