The Hyperbolic Geometry of Angels and Devils

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You see, there's got to be something on the other side you might think. I mean, it's only worth thinking. So wait, let's just get this correct in people's minds. This is a boundary that we're talking about that is literally infinitely far away, but you're saying the photon experiences zero time. That's exactly right. But I think it's very useful if you have seen these pictures by the Dutch artist, M.C. Eshir. There's a very famous one with angels and devils and they in the middle you can see the angels and devils interlocking. And then you go out, there's a circular boundary. And they seem to get

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.