Joel Berger with his Gear (IMAGE) Colorado State University Caption Berger experiments with models -- including donning a polar bear suit -- to approach animals like the muskox and document behaviors. Credit Joe Mendoza/CSU Photography 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.