The science / faith debate rages on. Yet many leading scientists have an active Christian faith. Here 17 scientists, all esteemed by their peers, tackle two questions: What difference their faith makes to their scientific practice; and What difference their science makes to their understanding of their faith. Contributors include: Francis Collins, Director, Human Genome Project Joan Centrella, Chief of the Gravitational Astrophysics Laboratory, NASA Bob White, Professor of Geophysics, University of Cambridge Alister McGrath, Professor of Theology, King's College London, and molecular biologist Wilson Poon, Professor of Physics, University of Edinburgh