China's Space Shot a Prelude to Manned Flight

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Cloning Claim Stirs Skepticism, Ethical Debate

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Researchers Skeptical of Human Clone Claim

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Does a Low-Calorie Diet Equal a Longer Life?

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Smallpox Debate Focuses on the Numbers

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Studies Address Merits of Smallpox Plan

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Doctors, Lawyers Tussle over Texas Malpractice Caps

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Environmentalists Blast Relaxed Rules for Farm Runoff

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