Astrophysicist Martin Rees has suggested that Dawkins' attack on mainstream religion is unhelpful. Regarding Rees' claim in his book "Our Cosmic Habitat" that "such questions lie beyond science; however, they are the province of philosophers and theologians", Dawkins asks "what expertise can theologians bring to deep cosmological questions that scientists cannot?" Elsewhere, Dawkins has written that "there's all the difference in the world between a belief that one is prepared to defend by quoting evidence and logic, and a belief that is supported by nothing more than tradition, authority or revelation."