In American Cosmic, D.W. Pasulka, a professor of religious studies at the University of North Carolina, Wilmington, draws on a six-year ethnographic study and the work of Carl Jung (Flying Saucers) and Jacques Vallee (Passport to Magonia and The Invisible College) to explain the widespread belief in aliens. Pasulka identifies three aspects of UFO inquiry: physical evidence (crash sites and artifacts); testimonials made by experiencers; and the persistence of belief whether or not there is verifiable evidence to support it. Pasulka also challenges the view that UFO believers are uneducated, fringe members of society. Some very well-regarded scientists, she indicates,...