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  1. Mother and Child Disunion

    Data on extensive giveaways of daughters by their mothers in northern Taiwan a century ago may challenge influential theories of innate maternal sentiments.

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  2. The Bad Seed

    Researchers are racing to identify tumor-forming stem cells in skin, lung, pancreatic, and many other cancers.

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  3. Earth

    Smoking out a source of painful menses

    Breathing in secondhand smoke may contribute to the development of menstrual cramps.

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  4. Earth

    Allergic to computing?

    The plastic cases of certain computer monitors emit a chemical—triphenyl phosphate—that can cause allergic reactions.

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  5. Health & Medicine

    Immune response in brain sparks nausea

    Ailments ranging from the common cold to many types of cancer can make people nauseous, an effect that may occur because signals from the brain suppress the muscle contractions required for digestion.