The aurora borealis, or northern lights, fill the sky above the Takotna, Alaska checkpoint during the Iditarod Trail Sled Dog Race on March 9, 2011. (Bob Hallinen/Associated Press/The Anchorage Daily News) #
The aurora borealis, or northern lights, fill the sky above the Takotna, Alaska checkpoint during the Iditarod Trail Sled Dog Race on March 9, 2011. (Bob Hallinen/Associated Press/The Anchorage Daily News) #
