Alien Earth   
Aurora Borealis
AP Photo/M. Scott Moon

Aurora Borealis




In this September 3, 2006 photo, a spectator watches the aurora borealis rise above the Alaska Range, in Denali National Park, Alaska. On Thursday, July 24, 2008, NASA released findings that indicate magnetic explosions about one-third of the way to the moon cause the northern lights, or aurora borealis, to burst in spectacular shapes and colors, and dance across the sky.

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