Sarah Tishkoff, the David and Lyn Silfen University Professor in Genetics and Biology at the University of Pennsylvania, will discuss the results of recent analyses of genome-scale genetic variation in geographically, linguistically, and ethnically diverse African populations for the purpose of reconstructing human evolutionary history in Africa and the genetic basis of adaption to diverse environments. This event is sponsored by the Clarke Forum for Contemporary Issues and co-sponsored by the Departments of Biology and Anthropology. This program is also part of the Clarke Forum’s semester theme, The Meanings of Race.