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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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DNA Finding May Aid Breast Cancer Fight

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A Very Special Shark Gives Birth

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Teacher Weighs In on '30-something' Study

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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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