polar bear (IMAGE) University of East Anglia Caption A curious polar bear near Greenland checks out the icebreaker Polarstern. Polar bears, which feed on seals, are part of the arctic ocean food web that climate change threatens. Credit Katrin Schmidt Usage Restrictions only to be used in relation to this release 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.