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Commencement traditions, explained

Penn Today dives into some of the unique sights and sounds that help commemorate the joyous occasion.
A Penn Commencement in 1953.
Penn’s 1953 Commencement ceremony, held at the Quadrangle Dormitories.
(Image: Mike Pearlman/University of Pennsylvania Archives)

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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