It is possible to be dismissive of many religious beliefs on the grounds that they appeal to—or depend upon—domains that are empirically opaque or otherwise unsurveyable. How can we know what is true or false of a world that can only be visited in the imagination? But judged by this same criterion, many popular and widely believed scientific theories are not much more credible. The author of the M-Factor critically examines dark matter, quantum mechanics, and evolutionary cosmology in this light. These ideas, he argues are, modern-day analogues of ancient mythologies. Why—he asks—are humans prone to magical and delusional thinking? He suggests that the answer may lie in the survival value of the imagination...