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28 | Roger Penrose on Spacetime, Consciousness, and the Universe

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

CHAPTER

The Hyperbolic Geometry of Angels and Devils

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

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