New study says melting ice keeps polar bears in perpetual motion

Photo via Flickr Creative Commons courtesy of Christopher Michel.A new U.S. study of polar bears off Alaska’s coasts says faster-moving sea ice brought on by rapid global warming is adding to the animals’ physiological stress.
Research ecologist George Durner said that adds to problems for polar bears in the southern Beaufort Sea.
“Polar bears in those regions largely stay within those subpopulation areas throughout their lives,” Durner said. “But to do that they ca