R Lee Lyman is professor of anthropology at University of Missouri, formerly at Oregon State University. He is co-author or co-editor of Adding Prehistory to Conservation Biology: Zooarchaeological Studies from North America, Cladistics and Archaeology, Style, Function, Transmission: Evolutionary Archaeological Perspectives, and many articles.
Michael Brian Schiffer is Fred A. Riecker Distinguished Professor of Anthropology at the University of Arizona and Research Associate at the Lemelson Center, National Museum of American History, Smithsonian Institution. He is the author of six previous books on technology.