Betsy Levy Paluck is a psychology professor at Princeton University. She ran a year-long experiment in Rwanda to see whether radio soap operas could be used to reduce prejudice. John D. & Catherine T. MacArthur Foundation hide caption
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Rebecca Richards-Kortum is a "genius grant" winner with a very busy schedule. The engineering professor, who encourages students to come up with medical devices that will be valuable in the developing world, is the mother of six and a marathon runner. John D. and Catherine T. MacArthur Foundation hide caption