Dolly's Creator Weighs in on Human Cloning

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Mineral on Mars Offers Clues to Climate

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Breast Cancer Study Quantifies Risk

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Overseas Science Ethics Questioned

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U.S., Chinese Cooperate on Embryo Study

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China Succeeds in Fertility Transfer

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Trial Halted After Breast Cancer Drug Shows Benefits

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Americans Win Nobel Chemistry Prize

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SARS Treatment Shows Promise

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Getting to the Bottom of REM

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Rough Draft of Dog Genome Released

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Galileo Heads for Fiery Death

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Study: Monkey Business a Fair Affair

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