Cosmology is the study of the physical universe—or the world of nature as science conceives of it—and is the domain of science. Metaphysics, on the other hand, deals with all there is. (The terms worldview and Big Picture are used interchangeably with metaphysics in this book.) In the worldview that holds that nature is all there is, metaphysics coincides with cosmology. That metaphysics is named naturalism.
