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  1. Life

    Dieting may plant seeds of weight regain

    Cutting calories causes changes in the brains of mice that appear to encourage binge eating under stressful conditions years later.

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  2. Chemistry

    Snot has the power to alter scents

    Enzymes in mice's nasal mucus can alter certain odors before the nose can detect them, a new study finds.

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  3. Physics

    Dissolving a puzzle

    A mathematical analysis shows what it takes to remove rock fast enough to create a cavern.

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  4. Chemistry

    The nitty-gritty of diamond polishing

    Researchers figure out what happens at the atomic scale when jewelers polish the hardest substance known.