Frank Close, OBE, is Professor of Physics at Oxford University and a Fellow of Exeter College. He was formerly vice president of the British Association for Advancement of Science, Head of the Theoretical Physics Division at the Rutherford Appleton Laboratory, and Head of Communications and Public Education at CERN. He is the author of several books and was the winner of the Kelvin Medal of the Institute of Physics for his 'outstanding contributions to the public understanding of physics'.