It may be the latest evidence of global warming: Polar bears are drowning.The drownings were rare, but not anymore:
Scientists for the first time have documented multiple deaths of polar bears off Alaska, where they likely drowned after swimming long distances in the ocean amid the melting of the Arctic ice shelf. The bears spend most of their time hunting and raising their young on ice floes.
In a quarter-century of aerial surveys of the Alaskan coastline before 2004, researchers from the U.S. Minerals Management Service said they typically spotted a lone polar bear swimming in the ocean far from ice about once every two years. Polar-bear drownings were so rare that they have never been documented in the surveys.
While the government researchers won't speculate on why a climate change is taking place in the Arctic, environmentalists unconnected to the survey say U.S. policies emphasizing oil and gas development are exacerbating global warming, which is accelerating the melting of the ice. "For anyone who has wondered how global warming and reduced sea ice will affect polar bears, the answer is simple -- they die," said Richard Steiner, a marine-biology professor at the University of Alaska.What a legacy for the Bush Administration: Ignoring Global Warming, Destroying Species. They should be very proud.