Scientists Grapple with 'Dark Energy' Theory

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Mad Cow Disease Feared in Washington State

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Study: Soot Plays Big Role in Climate Warming

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Images from NASA's Newest Camera

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Science Group Issues Climate Change Warning

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Unraveling Mammal Evolution in Africa

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Sea Creature Turns Up as Oldest Male Fossil

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Is Risk of Disease in Food Supply Increasing?

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Study: European Language Began in Turkey

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It Takes a Village to Raise a Baboon Child, Too

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Voyager Nears End of Solar System

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Study Analyzes Changes in Ice Cap

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