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Photo By NASA
Thu, Dec 20, 2012 10:24 AM EST
This artist's impression shows a red giant engulfing a Jupiter-like planet as it expands.
Where Will Doomed Earth's Last Organisms Live?
New U.S. climate strategy coming within weeks: Obama adviser
Obama making plans to tackle global warming
Obama renews calls for nuclear reductions
In the Heat of Berlin, Obama Signals He's Finally Ready to Act on Climate …
Obama says U.S. 'will do more' to fight climate change
Obama to prod West to take on global challenges in Berlin speech