Kate Lyons (IMAGE) University of Nebraska-Lincoln Caption Kate Lyons stands in Elephant Hall at the University of Nebraska State Museum. Behind her looms Archie, the largest Columbian mammoth fossil in the world. Like many other massive island inhabitants, a now-extinct ancestor of the Columbian mammoth shrank — evolving from roughly 20,000 pounds to 2,000 — while on California’s Channel Islands. Credit Craig Chandler | University of Nebraska–Lincoln Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.