Graeme Ruxton obtained a first degree in Physics before getting a PhD in Statistics and Modelling Science. After his PhD he worked for several years with the Scottish Agricultural Statistical Service in Edinburgh. He then got a lectureship in Ecology at the University of Glasgow, where he isnow Professor of Theoretical Ecology. Nick Colegrave trained as an evolutionary biologist, obtaining his first degree at the University of Sussex, and his PhD on the evolution of competition strategies at the University of Sheffield. Since then he has held a number of postdoctoral research positionsat a range of universities including, McGill, St Andrews, Glasgow and Edinburgh, working on various aspects of evolutionary biology, with a range of organisms. At various points he has also held the post of zoology demonstrator at the University of Edinburgh, teaching experimental design to zoologystudents and advising on statistics. He is now lecturer in Biology at Edinburgh.