Joseph Silk FRS is Homewood Professor at The Johns Hopkins University, Research Scientist at the Institut d'Astrophysique de Paris, CNRS and Sorbonne Universities, and Senior Fellow at the Beecroft Institute for Particle Astrophysics at the University of Oxford. He has written seven popular books on cosmology, including The Big Bang, 3rd edition (2001), On the Shores of the Unknown: A Short History of the Universe (Cambridge, 2005), and The Infinite Cosmos: Questions from the Frontiers of Cosmology (2006). His research areas include dark matter, the formation of the galaxies, and the big bang theory. He has received numerous awards and prestigious international fellowships.