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Wharton expert explains the crashing crypto market

Sarah Hammer, managing director of the Stevens Center for Innovation in Finance at the Wharton School, discusses the cryptocurrency meltdown and how more than $1 trillion in value was wiped away in a month.

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    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