Thin Ice (image) University of Washington Share Print E-Mail Caption A polar bear tests the strength of thin sea ice. Credit Mario Hoppmann/imaggeo.egu.eu Usage Restrictions Photo credit required. 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.