Study: Ethanol Worse for Climate Than Gasoline

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Explorer 1, America's Answer to Sputnik

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Genetic First: Bacterium's Code Built from Scratch

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New Images May Shed Light on Mercury's Mysteries

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Mix of Factors Led to Record Arctic Ice Melt in 2007

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NASA Probe Glimpses Unseen Side of Mercury

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Gas Cloud Headed for Milky Way Collision

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NASA Releases Cryptic Airline Safety Study

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Greenland Glacier Studied for Insight into Warming

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Greenland's Mysterious Holes Speed Ice Flow to Sea

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Iceland Seeks to Restore Soils, Forests

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Contentious Climate Talks Yield 'Bali Roadmap'

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Climate Roadmap Emerges from Grueling Bali Talks

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Gore Condemns U.S. Stance at Climate Talks

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