18 | Clifford Johnson on What's So Great About Superstring Theory

18 | Clifford Johnson on What's So Great About Superstring Theory

String theory is a speculative and highly technical proposal for uniting the known forces of nature, including gravity, under a single quantum-mechanical framework. This doesn't seem like a recipe for creating a lightning rod of controversy, but somehow string theory has become just that. To get to the bottom of why anyone (indeed, a substantial majority of experts in the field) would think that replacing particles with little loops of string was a promising way forward for theoretical physics, I spoke with expert string theorist Clifford Johnson. We talk about the road string theory has taken from a tentative proposal dealing with the strong interactions, through a number of revolutions, to the point it's at today. Also, where all those extra dimensions might have gone. At the end we touch on Clifford's latest project, a graphic novel that he wrote and illustrated about how science is done. Clifford Johnson is a Professor of Physics at the University of Southern California. He received his Ph.D. in mathematics and physics from the University of Southampton. His research area is theoretical physics, focusing on string theory and quantum field theory. He was awarded the Maxwell Medal from the Institute of Physics. Johnson is the author of the technical monograph D-Branes, as well as the graphic novel The Dialogues. Home page Wikipedia page Publications A talk on The Dialogues Asymptotia blog Twitter

Episoder(415)

53 | Solo -- On Morality and Rationality

53 | Solo -- On Morality and Rationality

What does it mean to be a good person? To act ethically and morally in the world? In the old days we might appeal to the instructions we get from God, but a modern naturalist has to look elsewhere. To...

1 Jul 20192h 5min

52 | Frank Lantz on the Logic and Emotion of Games

52 | Frank Lantz on the Logic and Emotion of Games

Games play an important, and arguably increasing, role in human life. We play games on our computers and our phones, watch other people compete in games, and occasionally break out the cards or the Mo...

24 Jun 20191h 4min

51 | Anthony Aguirre on Cosmology, Zen, Entropy, and Information

51 | Anthony Aguirre on Cosmology, Zen, Entropy, and Information

Cosmologists have a standard set of puzzles they think about: the nature of dark matter and dark energy, whether there was a period of inflation, the evolution of structure, and so on. But there are a...

17 Jun 20191h 31min

50 | Patricia Churchland on Conscience, Morality, and the Brain

50 | Patricia Churchland on Conscience, Morality, and the Brain

It's fun to spend time thinking about how other people should behave, but fortunately we also have an inner voice that keeps offering opinions about how we should behave ourselves: our conscience. Whe...

10 Jun 20191h 12min

49 | Nicholas Christakis on Humanity, Biology, and What Makes Us Good

49 | Nicholas Christakis on Humanity, Biology, and What Makes Us Good

It's easy to be cynical about humanity's present state and future prospects. But we have made it this far, and in some ways we're doing better than we used to be. Today's guest, Nicholas Christakis, i...

3 Jun 20191h 54min

48 | Marq de Villiers on Hell and Damnation

48 | Marq de Villiers on Hell and Damnation

If you're bad, we are taught, you go to Hell. Who in the world came up with that idea? Some will answer God, but for the purpose of today's podcast discussion we'll put that possibility aside and look...

27 Mai 20191h 11min

47 | Adam Rutherford on Humans, Animals, and Life in General

47 | Adam Rutherford on Humans, Animals, and Life in General

Most people in the modern world — and the vast majority of Mindscape listeners, I would imagine — agree that humans are part of the animal kingdom, and that all living animals evolved from a common an...

20 Mai 20191h 38min

46 | Kate Darling on Our Connections with Robots

46 | Kate Darling on Our Connections with Robots

Most of us have no trouble telling the difference between a robot and a living, feeling organism. Nevertheless, our brains often treat robots as if they were alive. We give them names, imagine that th...

13 Mai 20191h 6min

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