Who do you want to see receive $20,000 to put their Earth-saving idea into action? Check out the ten Green Effect finalists, and until July 20 you can vote—up to once a day—for your favorite idea!
Friday, July 10, 2009 |
Friday, July 10, 2009 |
Photo: "Gravity Tractor," Super Telescopes Enlisted to Battle Killer AsteroidsA massive spaceship that would act as a "gravity tractor" and two upcoming telescope projects were among the slate of new proposals for addressing the asteroid menace presented today at a scientific conference. Image by Don Davis, courtesy NASA
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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