Melting ice keeps polar bears in perpetual motion, study says

Faster-moving sea ice brought on by rapid global warming is added to the physiological stress of Alaska’s polar bears, a new study says. (Creative Commons photo by Christopher Michel/Flickr)
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.
That adds to problems for polar bears in the southern Beaufort Sea, research ecologist George Durner said.
“Polar bears in