LiveScience: Polar bears have shifted to a diet of more land-based food in response to climate change and melting sea ice in the Arctic, new research finds. The results suggest that polar bears, at least in the western Hudson Bay area, may be slightly more flexible in the face of climate change than previously thought. "We found they were eating more of what is available on the land," including snow geese, eggs and caribou, said study co-author Linda Gormezano, a vertebrate biologist at the American Museum...