PAUL DAVIES is an internationally acclaimed physicist, cosmologist, and astrobiologist at Arizona State University, where he runs the pioneering Beyond Center for Fundamental Concepts in Science. He also chairs SETI's Post-Detection Taskgroup, so if scientists succeed in finding intelligent life, he will be among the first to know. In addition to his many scientific awards, the Guardian newspaper recently named Davies one of the "masters of the universe," along with Richard Dawkins and Michael Frayn. He is the author of more than twenty books, including the bestseller The Mind of God, About Time, How to Build a Time Machine, and The Goldilocks Enigma. The asteroid 1992OG was officially renamed Pauldavies in his honor.

Niels Henrik Gregersen is Professor of Systematic Theology and Co-Director of the Centre of Naturalism and Christian Semantics, both at the University of Copenhagen. He has won several international research awards, including one from the John Templeton Foundation for work on the constructive interface between science and religion.