Adriana Petryna is the Edmund J. and Louise W. Kahn Term Professor in Anthropology at the University of Pennsylvania. In her ethnographic studies in Eastern Europe and the United States, she probes the socio-political natures of science, how populations are enrolled in experimental knowledge-production, and what becomes of citizenship and ethics in that process. She is the author of the award-winning books Life Exposed: Biological Citizens after Chernobyl and When Experiments Travel: Clinical Trials and the Global Search for Human Subjects, and co-editor of Global Pharmaceuticals: Ethics, Markets, Practices and When People Come First: Critical Studies in Global Health. Petryna’s explorations of biological citizenship, ethical variability, and experimentality broke new ground in the social sciences and advances the critical study of global health. Her body of work was awarded the Royal Anthropological Institute’s Wellcome Medal. In her new book project, What is a Horizon? Abrupt Climate Change and Human Futures, she focuses on the social complexities of abrupt environmental shifts and argues for horizoning as a distinct intellectual and ethical labor. At Penn, Petryna directs the MD-PhD program in Anthropology as well as the undergraduate program in Medical Anthropology and Global Health. Her research has been supported by the National Science Foundation, the National Endowment for the Humanities, the Wenner-Gren Foundation, the Social Science Research Council, and the School for Advanced Research. She was a Member of the School of Social Science at the Institute for Advanced Study and, most recently, a Faculty Fellow at Princeton University’s Center for Human Values.