Brian Fagan is one of the world's leading archaeological writers and an internationally recognized authority on world prehistory. He is a Distinguished Emeritus Professor of Anthropology at the University of California, Santa Barbara, and the author of several widely read books on ancient climate change. He has lectured about the subject to audiences large and small throughout the world. His latest book is Fishing: How the Sea Fed Civilization (Yale University Press, 2018). Nadia Durrani is a Cambridge University-trained archaeologist and writer, with a PhD in Arabian archaeology. She is the editor and founder of Past Worlds magazine, and is co-author, with Brian Fagan, of several books including What we Did in Bed and Bigger Than History.