Why do we feel empathy for some people, but not others? Where does this feeling of empathy come from? These questions have been the focus of one University of Chicago neurobiologist’s career. And to find answers, Prof. Peggy Mason started studying an unlikely creature: rats.

It turns out that rodents have a lot to teach us about empathy. And the implications of Mason’s work give us important insights into how to tackle some of society’s most difficult problems.