Scientists are not drawing any conclusions about a relationship between global warming and their newly released findings that female polar bears and their cubs are routinely completing 100-mile swims through Arctic waters. U.S. Geological Survey biologists attached collars with GPS technology to 52 bears over a five-year span in the Beaufort Sea off Alaska, reports Dot Earth blogger Andrew Revkin in The New York Times. They recorded 50 swims averaging 96 miles. One bear swam over 200 miles. Read More
