Ian Stewart is Professor of Mathematics at the University of Warwick, UK, and Professor of Mathematics at the Royal Institution of Great Britain. He is the author of over sixty books, including the bestselling Does God Play Dice?, and frequently appears on radio and television. In 1995 he was awarded the Royal Society Michael Faraday medal.
Jack Cohen is an internationally known reproductive biologist who was a university teacher for thirty years and has published nearly a hundred research papers. His books include Living Embryos, Reproduction, Spermatozoa, Antibodies and Infertility and The Privileged Ape. He acts as a consultant to top science fiction writers and frequently appears on radio and television.