Photo of the Day

Associated Press
In this Jan. 18, 2013 photo released by scientist Nancy Bertler, a solar halo brightens the sky over the remote camp where Bertler and 13 others worked, on Roosevelt Island, Antarctica. Caused by light reflecting and refracting from ice crystals, such halos are spectacular but typically presage bad weather. Antarctica's pristine habitat provides a laboratory for scientists studying the effects of climate change. (AP Photo/Nancy Bertler)

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