Lewis Wolpert is Emeritus Professor of Biology as Applied to Medicine at University College, London. His research interests are in the mechanisms involved in the development of the embryo. He was made a Fellow of the Royal Society in 1980 and awarded the CBE in 1990. He was made a Fellow of the Royal Society of Literature in 1999. His books include “Malignant Sadness – The Anatomy of Depression”; “The Unnatural Nature of Science”; “Six Impossible Things Before Breakfast – The evolutionary origins of belief”; and most recently, “How We Live, and Why We Die – the secret life of cells”.