Michael Scott is Moses and Mary Finley Fellow in Ancient History at Darwin College, Cambridge. He has recently published From Democrats to Kings: The Brutal Dawn on a New World from the Downfall of Athens to the Rise of Alexander the Great (2009).

Since starting research in 1968, Tony Cox has published over 150 research papers and 30 reviews and evaluations on a range of topics in atmospheric chemistry. His main contributions to the understanding of the chemistry of the atmosphere is through studies of kinetics and mechanisms of atmospheric reactions. His work led to many new insights into the atmospheric oxidation of sulphur dioxide and volatile organic compounds, the formation of peroxyacetyl nitrate and the chemistry of alkoxy radicals, which are central to photochemical oxidant pollution. He has also demonstrated the formation of novel unstable halogen compounds which become significant at low atmospheric temperatures and play important roles in the chemistry of Antarctic ozone depletion. He has contributed to numerous international assessments of tropospheric chemistry and stratospheric ozone depletion.

Layla Skinns is a Lecturer in Criminology at the Centre for Criminological Research, School of Law, University of Sheffield and formerly the Adrian Socio-Legal Research Fellow, Darwin College and Teaching Associate at the Institute of Criminology, University of Cambridge. She has conducted a wide array of research on topics such as crime prevention, drug users and the criminal justice system, restorative justice and, most recently, on policing in England, Ireland, Australia and the United States. She has also authored a number of scholarly publications, as well as policy reports aimed at a wider audience of criminal justice practitioners and policymakers.