Among intelligent nonexperts who have weighed in on climate change, Freeman Dyson has become, now that Michael Crichton is dead, perhaps our most prominent global-warming skeptic. Charlie Rose began his interview with questions about the climate. Dyson answered that he remained very skeptical about the dangers of global warming. He did not believe the pronouncements of the experts. He did not claim to be an expert himself, so he would not argue the details with anybody; he had not given much time to the issue and did not pretend to know the real answers, but what he knew for sure was that the global-warming experts did not know the answers, either.