LiveScience: Even though some polar bears are hunting on land more often in areas hit by climate change, a diet of bird eggs and berries can't sustain these huge animals, a new study finds.
Only a handful of polar bears have been spotted snacking on land-based foods to supplement their traditional, blubber-rich diet of seals and marine mammals. But researchers have wondered whether the high-protein, high-carbohydrate foods polar bears eat on land -- such as caribou and berries -- could help these symbols of...