[B]elief in a “God-of-the-gaps” is vulnerable to scientific advances that close the gaps. Among the gaps on which theists once relied, and on which many still rely, is the presumed inability of the sciences to explain the origin of the human species or of life or the Earth or our solar system. These gaps have not been largely closed. The ultimate gap, for many theists, concerns the origin of the universe; even if the other gaps are closed, that one can never be. But we have just been seeing how it too might be closed.
John Post, Metaphysics: A Contemporary Introduction, New York, 1991, p. 90