Is it feasible for scientists and the public to communicate intelligently? Why is it necessary for people, political authorities, judges, the media, to be able to notice the distance between maintaining that "in the light of the available evidence the risk of an earthquake has not increased" and stating that "there is no risk at all"? What responsibility does the expert community have in this process? These are the kinds of questions addressed in this book, which examines the possibilities of a reasonable dialogue between science and society, which tends to favor the circulation and social appropriation of knowledge.