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  • Natural Sciences
  • Mentorship strategies to boost diversity in paleontology

    Drawing on research as well as their experiences as women of color in paleontology, Aja Carter and Erynn Johnson, who earned doctoral degrees from Penn, coauthored a paper offering advice for making the field more inclusive.
    Scientists Erynn Johnson and Aja Carter use a 3D printer to make shell shapes
    Erynn Johnson and Aja Carter both earned their doctoral degrees in paleontology from Penn, employing pioneering techniques, such as 3D printing to replicate the forms of ancient creatures. In a new publication, they share advice for attracting and retaining students and trainees from underrepresented groups to paleontology. 

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  • Tumor-on-a-chip offers insight into cancer-fighting cells in immunotherapy
    Hand holding a microdevice

    Penn engineers and collaborators have developed a transparent, micro-engineered device that houses a living, vascularized model of human lung cancer—a “tumor on a chip”—and show that the diabetes drug vildagliptin helps more CAR T cells break through the tumor’s defenses and attack it effectively.

    (Image: Courtesy of Dan Huh)

    Tumor-on-a-chip offers insight into cancer-fighting cells in immunotherapy

    Penn engineers and collaborators have built a living tumor on a chip to expose how cancers block immune attacks, and how one existing drug could make immunotherapy like CAR T more effective against solid tumors.

    Oct 23, 2025

    Can tiny ocean organisms offer the key to better climate modeling?
    Researcher Xin Sun injects substance into glass vials.

    Xin Sun prepares samples collected from the Eastern Tropical North Pacific aboard a research vessel. By adding stable isotope tracers to these vials, Sun and her team can track how different microbial groups convert nitrogen compounds into nitrous oxide, revealing how subtle shifts in oxygen and organic matter change the ocean’s chemistry.

     
     

    (Image: Courtesy of Xin Sun)

    Can tiny ocean organisms offer the key to better climate modeling?

    In the shadowy layers of the Pacific, microbes decide how much nitrous oxide—a potent greenhouse gas—rises skyward. New research from Penn’s Xin Sun offers an improved understanding of microbial ecology and geochemistry—key to forecasting global emissions in response to natural and man-made climate change.

    Oct 20, 2025

    X-ray plates from 1896 give a snapshot of Penn’s place in history
    An X-ray plate from 1896.

    Two X-ray plates from Arthur Goodspeed, believed to have created the world’s first X-ray image, were donated by his family to Penn’s University Archives.

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    X-ray plates from 1896 give a snapshot of Penn’s place in history

    A gift from the family of Penn physicist Arthur Goodspeed represents the beginning of a revolution in medicine that began at Penn.

    Oct 20, 2025