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  1. Science & Society

    U.S. religion is increasingly polarized

    Organized religion in the United States increasingly belongs to fervent believers, a new study finds.

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  2. Neuroscience

    In a tally of nerve cells in the outer wrinkles of the brain, a dog wins

    Among some carnivores, golden retrievers rate at the top for numbers of nerve cells, study finds.

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  3. Health & Medicine

    Fracking linked to low birth weight in Pennsylvania babies

    Babies born to moms living within one kilometer of a hydraulic fracturing site were more likely to be born underweight, researchers say.

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  4. Earth

    Federal maps underestimate flood risk for tens of millions of people, scientists warn

    New flood maps suggest that the U.S.