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Do DIY DNA kits revive a harmful perceived link between genetics and race?

Research from sociologist Wendy Roth reveals that on average, these tests don’t reinforce the idea of essentialism, but how much participants know about genetics going in matters.

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  • Exposure to air pollution worsens Alzheimer’s disease
    Emissions from a power plant.

    Image: Pencho Chukov via Getty Images

    Exposure to air pollution worsens Alzheimer’s disease

    New research from Penn Medicine finds living in areas with high concentration of air pollution is associated with increased buildup of amyloid and tau proteins in the brains of Alzheimer’s patients, accelerating cognitive decline.

    Sep 9, 2025