The Hawking Point

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Inflation, in the inflationary model, started very close to the Big Bang and then this huge expansion took place. And most things which happen in that region would be spread out to an enormous size. So only at the very end would you get something which is restricted to this four degrees across the sky. That's the size of it. We don't see the signal bigger than that. Any cluster turns into a whopping big black hole. I think pretty well all the matter gets swallowed. Now one of the real problems for inflation of this, you see, is that the point you would be seeing, not the Big Bang inflation, would be what's called the graceful exit moment. If

Sir Roger Penrose has had a remarkable life. He has contributed an enormous amount to our understanding of general relativity, perhaps more than anyone since Einstein himself -- Penrose diagrams, singularity theorems, the Penrose process, cosmic censorship, and the list goes on. He has made important contributions to mathematics, including such fun ideas as the Penrose triangle and aperiodic tilings. He has also made bold conjectures in the notoriously contentious areas of quantum mechanics and the study of consciousness. In his spare time he's managed to become an extremely successful author, writing such books as The Emperor's New Mind and The Road to Reality. With far too much that we could have talked about, we decided to concentrate in this discussion on spacetime, black holes, and cosmology, but we made sure to reserve some time to dig into quantum mechanics and the brain by the end. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.