Andrew Newberg, M.D., is the director of the Center for Spirituality and the Mind at the University of Pennsylvania. He is one of the founders of the new interdisciplinary field called neurotheology. He is an associate professor in the department of radiology, with secondary appointments in the departments of psychiatry and religious studies, at the University of Pennsylvania. His work has been featured on Good Morning America, Nightline, Discovery Channel, BBC, NPR, and National Geographic Television. He is the co-author of Why God Won't Go Away, Born to Believe, and The Mystical Mind. Mark Robert Waldman is an associate fellow at the Center for Spirituality and the Mind at the University of Pennsylvania. He is a therapist, the author or co-author of ten books, including Born to Believe (with Andrew Newberg), and was the founding editor of Transpersonal Review. He lectures throughout the country on neuroscience, religion, and spirituality and conducts research with numerous religious and secular groups. His work has been featured in dozens of newspapers and magazines and on syndicated radio programs.