Global Warming a Hot Topic in Congressional Hearing

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Panel: EPA Should Reassess Dioxin Threat

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Residue from Ancient Rain May Redate Sierras

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Study: Dry Seasons -- Not Brush -- Spur Wildfires

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Ants Count Their Way Home

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Spring Is Early, and So Are the Birds

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National Academy: Earth's Cimate History Mixed

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Black Holes Rely on Magnetism, Researchers Say

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Reading the Poles: Earth's Ice in Jeopardy

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Work in Colored Lights Nets Millennium Prize

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Rediscovered Millipede Has a Leg Up on Competitors

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Dust Storms Threaten Snow Packs

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Backyards May Play Role in Climate Change

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Fossil Suggests Missing Link From Fish to Land

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