Robert N. Proctor is a professor of history of science at Stanford University. He specializes in 20th century science, technology, and medicine. He also does work on human origins including: changing notions of the oldest tools, art and fire, changing body imagery, the history of molecular anthropology, visual rhetoric in phyletic diagrams, changing archaeological techniques and images of "humaness," the history of global creationism and of Evo Devo, catastrophic geology, global climate change, and environmental policy.