Lydia Hopper Editor

Stephen Ross is the director of the Lester E. Fisher Center for the Study and Conservation of Apes at Lincoln Park Zoo in Chicago. He is a coeditor of The Mind of the Chimpanzee (2010) and, with Lydia Hopper, Chimpanzees in Context (2020).

Lydia Hopper is an associate professor and director of behavioral management at the Johns Hopkins University School of Medicine. She is an adjunct scientist at and was previously assistant director of the Lester E. Fisher Center for the Study and Conservation of Apes at Lincoln Park Zoo.