Study: Human Ancestors Walked Upright Early
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Avandia Scare Continues to Raise Concerns
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American Red Cross Fights Ban On Gays' Blood
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Studying a Koala Mystery in Eastern Australia
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Study: Kids' Lack of Sleep Hurts Parents, Too
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A Very Special Shark Gives Birth
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Study: Men in Their 30s Make Less Than Their Dads
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Scientists Make Progress on Tiny Biocomputers
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A New Twist on Photosynthesis
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The Nitty Gritty on the Physics of Sand
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Search for an HIV Vaccine Expands
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Studies Hint at a Way to Regrow Lost Hair
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New Tornado Rating System Scales Back Winds
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