Alan Chalmer works in the history and philosophy of the physical sciences. He is a member of an international group of scholars who are intent on integrating the history and the philosophy of science. They call their project &HPS and hold an international conference each year. Alan has published on seventeenth-century physics and chemistry, nineteenth century chemistry and nineteenth century electromagnetic theory and the history of atomism. His more philosophically-oriented research includes symmetry in physics, the nature of laws in physics and Brownian motion. His book, What is this thing called science?, has become a standard teaching resource in the philosophy of science and is available in nineteen languages