Colin Renfrew is Disney Professor Emeritus of Archaeology and former Director of the McDonald Institute for Archaeological Research at the University of Cambridge. He is the author and editor of many books. Paul Bahn is a prehistorian and archaeological writer, and the author and editor of numerous books, including the standard introduction to cave art, Images of the Ice Age, and the Cambridge Illustrated History of Archaeology. Elizabeth DeMarrais is Associate Professor in Archaeology at the University of Cambridge, where she teaches archaeological theory and the archaeology of the Americas. She has done fieldwork in Northwest Argentina, Cape Cod, Maui (Hawai'i), and the American Southwest, and is widely published.