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: Mysterious Explosion Caused Massive Star to BrightenThe star's sudden brightening in 1843 was caused by a mysterious explosion of a type never before identified—not stellar winds as previously thought, experts said in September 2008. Photograph courtesy NASA
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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