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Too Warm in Alaska: More Polar Bears Giving Birth on Land

Earth News from Alaska
Photo: Researchers suspect global warming is to blame and believe Alaska's bear population could be harmed if the climate grows warmer. (Photo courtesy

Jan 24, 2007
Too warm in Alaska: more polar bears giving birth on land. Pregnant polar bears in Alaska, which spend most of their lives on sea ice, are increasingly giving birth on land, according to researchers who say global warming is probably to blame. Though bears are powerful swimmers, at some point they might have to cross vast stretches of open water to reach habitat on shore suitable for building dens in which to give birth. "The sea ice changes may have reduced the availability or degraded the quality of offshore denning habits." In recent years, Arctic pack ice has formed progressively later and melted earlier each season.

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