Walter Gratzer is a biophysicist. He has spent most of his career at King's College London, with spells at Harvard and Columbia Universities. He is now Emeritus Professor at King's. Professor Gratzer has published numerous scientific papers, and many articles and reviews. He is the author of Eurekas and Euphorias and The Undergrowth of Science: Delusion, Self-Deception and Human Frailty.