John E. Clarkis an American archaeologist and academic researcher of pre-Columbian Mesoamerican cultures and holds a position as professor of anthropology at Brigham Young University. He is also director of the New World Archaeology Foundation. Clark has written and lectured extensively on Mesoamerican archaeology. Michael B. Collinsis a Research Associate Professor at Texas State University in San Marcos. He has specialized in the study of lithic technology and worked with prehistoric collections from North, Central, and South America, as well as the Near East and southwestern Europe. He collaborated on the lithics research for the preClovis site of Monte Verde, Chile. Dr. Collins is currently active in research on the earliest part of the American archaeological record and published Clovis Blade Technology (UT Press) and Clovis Stone Tool Technology (in press).