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What defines judicial activism? Not being an activist, says Kermit Roosevelt

The David Berger Professor for the Administration of Justice at Penn Carey Law explains judicial activism in a historical sense, and how justices today interpret the Constitution and federal and state policies.

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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