Cosmologist Lawrence M. Krauss joins a chorus of physicists and cosmologists who have been pushing into sacred ground, proclaiming more and more loudly in the last few years that science can explain how something — namely our star-spangled cosmos — could be born from, if not nothing, something very close to it. God, they argue, is not part of the equation. The book, “A Universe From Nothing,” is a best seller and follows recent popular tomes like “God Is Not Great,” by the late Christopher Hitchens; “The God Delusion,” by Richard Dawkins; and “The Grand Design,” by the British cosmologist Stephen Hawking (with Leonard Mlodinow), which generated headlines two years ago with its assertion that physicists do not need God to account for the universe.