David A. Raichlen is a biological anthropologist and professor at the University of Southern California, known for his interdisciplinary research on human evolution, physical activity, and health. He specializes in biomechanics and energetics, exploring how locomotion evolved in early hominins and how modern human movement patterns relate to evolutionary history. Raichlen has conducted fieldwork and lab-based studies, including work with hunter-gatherer populations such as the Hadza in Tanzania, to understand physical activity’s role in shaping the human body and brain. His research has been widely published in leading scientific journals and featured in prominent media outlets for its public health implications.