Mr. Eccles Presents | Mindscape Podcast – Roger Penrose


Blog post with show notes and transcript: https://www.preposterousuniverse.com/…

Patreon: https://www.patreon.com/seanmcarroll

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.

The Impossible Staircase…


…or is it? Have fun wracking your brain on this one. It’s an illusion invented, my sources tell me, by Lionel and Roger Penrose, mathematician, physicist, and also well-known among skeptics as a proponent of the idea of quantum neurobiology.

It was depicted by M. C. Escher in 1961, but earlier conceived by Swedish artist Oscar Reutersvärd, though neither Escher nor either Penrose are thought to have known it.

This is a good illustration of how our own senses can fool us, and a useful perceptual example of why direct experience is not as consistently reliable as pseudoscience advocates would have us believe.

(Last Update 2011/1/11, 4:30, Crediting Corrections)