Science and technology

FILE - In this June 15, 2014 file photo, a polar bear dries off after taking a swim in the Chukchi Sea in Alaska. About a third of the world's polar bears could be in imminent danger from greenhouse gas emissions in as soon as a decade, a U.S. government report shows. The U.S. Geological Survey, the Interior Department's research arm, said updated scientific models don't bode well for polar bear populations across the world, especially in Alaska, the only state in the nation with the white bears. (Brian Battaile/U.S. Geological Survey via AP, File)

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