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  1. Chemistry

    Pesticides tied to lower IQ in children

    Chemicals once sprayed in homes — and still used on farms — were found to have significant effects in three studies.

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  2. Life

    Life

    Colorful duck bills hint at sperm quality, plus dangerous jellies and throwback bees in this week’s news.

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  3. Health & Medicine

    Flies on meth burn through sugar

    Cellular effects may explain why addicts often have a sweet tooth.

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  4. Health & Medicine

    Mucus-related gene tied to lung disease

    People with pulmonary fibrosis are much more likely to make excess amounts of a normally beneficial protein, a study finds.