My research focuses on the relationship between ecology, physiology and behavior. I use non-invasive monitoring techniques to investigate the physiological causes and consequences of social behavior in humans and non-human primates. Most of this research has been done with the Kanyawara chimpanzee community in Kibale National Park, Uganda, but I have also done field work with human foragers and pastoralists in Tanzania. I am particularly interested in what comparisons between chimpanzee and human behavior and physiology can tell us about human evolution.