Because they spend most of their lives on the sea ice of the Arctic Ocean depending on the ocean for their food and habitat, polar bears are the only bear species to be considered marine mammals.

Climate change is threatening critical Arctic sea ice ecosystems, according to a new report, putting polar bears at risk for significant population declines by the end of the century. Ottawa: Climate ...

Something surprising has been happening to polar bears. Those living in Svalbard, a Norwegian archipelago, have been gobbling up hundreds of birds' eggs and looking healthier than they have in the ...