Breaking through Ice (IMAGE) Purdue University Caption This illustration shows how the bowhead whale uses its "bow"-shaped head to break through the ice. Credit Credit: Craig George, Department of Wildlife Management, North Slope Borough, Alaska 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.