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  • Stem cell signaling drives mammary gland development and, possibly, breast cancer

    New research illuminates the biology of breast tissue development and may pave the way to new strategies for diagnosing or even treating cancer
    Chakrabarti.mammary gland.2018
    A Penn-led team identified Dll1, a signaling molecule as a marker of mammary gland stem cells, and one that plays a vital role in normal development of the mammary tissue. Above, a cross-section of a mouse mammary gland. (Image: Sushil Kumar and Rumela Chakrabarti)

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  • A world shaped by water and access
    Three people test water below a sand dam.

    Griffin Pitt, right, works with two other student researchers to test the conductivity, total dissolved solids, salinity, and temperature of water below a sand dam in Kenya.

    (Image: Courtesy of Griffin Pitt)

    A world shaped by water and access

    Griffin Pitt’s upbringing made her passionate about water access and pollution, and Penn has given her the opportunity to explore these issues back home in North Carolina and abroad.

    Oct 8, 2025