William R. Shea holds the "Galileo Chair" of the History of Science at the University of Padua, in Italy. He is Past President of both the International Union of the History and Philosophy of Science and the International Academy of the History of Science, and is currently Chairman of the Standing Committee for the Humanities of the European Science Foundation in Strasbourg. He is the author, co-author, or editor of 25 books, including Galileo's Intellectual Revolution and The Magic of Numbers and Motion: The Scientific Career of Rene Descartes. Mariano Artigas is Professor of Philosoph...