NASA Scientist Feels Pressure Over Global Warming

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Challenger: What Went Wrong?

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NASA Sends Spacecraft to Pluto

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New Clue to Universe's Darkest Mystery

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U.S. Plan to Stockpile Bird-Flu Vaccine a Big Gamble

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Pandemic Flu Spurs Race for New Vaccine Methods

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Vaccine Production May Fail in Flu Pandemic

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Global AIDS Fund Boosts Health, Economy in Ghana

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Avian Flu Confirmed in Turkish Birds

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SIDS Recommendations Revised

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Scientists Win Nobel for Bacterium-Ulcer Link

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Nobel for Medicine Goes to Australian Scientists

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Researchers Race to Catalog Arctic Species

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The Arctic's 'Hidden Ocean'

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Heat Waves May Compound Global Warming

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