Hans Rausing Professor and chair of the History and Philosophy of Science at Cambridge University, Peter Lipton is also a fellow of King’s College, Cambridge. Much of his work concerns explication and inference in science, but his interests extend broadly across many of the major areas of philosophy. A graduate of Wesleyan University in Middletown, Connecticut, he continued his studies at Oxford University where he earned a B. Phil. and then a D. Phil. in philosophy in 1985. Dr. Lipton served as a tutor in the philosophy of science at Oxford and an assistant research professor at Clark University in Worcester, Massachusetts, before being appointed an assistant professor of philosophy at Williams College, a post he held for five years. He returned to England in 1991 as a assistant lecturer in philosophy at Cambridge and was promoted to lecturer three years later. He was named to his present professorship in 1997. Dr. Lipton has delivered named lectures at Edinburgh University, Williams College, and, in 2004, at The Royal Society and Bristol University, where he gave the Medawar Lectures, and at Cambridge, where he gave the Darwin Lecture. A fellow of the Academy of Medical Sciences and a member of the Nuffield Council on Bioethics and former chair of its Working Party on Pharmacogenetics, he also serves on the board of directors of the Williams College in Oxford Program. He was formerly consulting editor of Studies in the History and Philosophy of Science and is currently the journal’s advisory editor as well as a member of the editorial advisory panel of the British Journal for the Philosophy of Science and of the editorial board of the Ashgate series on New Critical Thinking in Philosophy. The author of numerous articles published in academic journals, Dr. Lipton is the editor of Theory, Evidence and Explanation (1995) and editor or co-editor of three special issues of Studies in the History and Philosophy of Science. He is also the author of Inference to the Best Explanation, which was first published by Routledge in 1991 and in an enlarged and revised edition in 2004.