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Polarization can happen even when rational people listen to each other

Using computer models, philosopher Daniel J. Singer, political scientist William Berger, and colleagues found that divides over factual issues can stem from humans’ limited memory capacity rather than from one side or the other being irrational.
A cartoon drawing of six people. Two are holding megaphones, one is holding a sign that says "Yes," one is holding a sign that says "No," and one is holding a cane.

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  • From a desert to an oasis: Penn engages in ambitious greening effort in the Sahel
    People gather around a large map placed on the floor.

    In Senegal, the ambitious Dakar Greenbelt project seeks to create an extensive network of ecological infrastructure in and around the city to sustainably address environmental concerns and enhance urban life. With support from David Gouverneur and Ellen Neises, Ph.D. candidate Rob Levinthal in the Weitzman School of Design led two courses that included a field trip to Dakar, that culminated in students presenting their visions for parts of the Greenbelt.

    (Image: Courtesy of Chaowu Li)

    From a desert to an oasis: Penn engages in ambitious greening effort in the Sahel

    Students from the Weitzman School of Design journeyed to Senegal to help with a massive ecological and infrastructural greening effort as part of their coursework. The Dakar Greenbelt aims to combat desertification and promote sustainable urban growth.

    Jan 31, 2025