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)

29 | Raychelle Burks on the Chemistry of Murder

29 | Raychelle Burks on the Chemistry of Murder

Sometimes science is asking esoteric questions about the fundamental nature of reality. Other times, it just wants to solve a murder. Today's guest, Raychelle Burks, is an analytical chemist at St. Ed...

14 Jan 20191h 15min

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

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

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, sing...

7 Jan 20191h 35min

Holiday Message 2018

Holiday Message 2018

There won't be any regular episodes of Mindscape this week or next, as we take a holiday break. Regular service will resume on Monday January 7, 2019. In the meantime, here is a special Holiday Messag...

24 Des 201844min

27 | Janna Levin on Black Holes, Chaos, and the Narrative of Science

27 | Janna Levin on Black Holes, Chaos, and the Narrative of Science

It's a big universe out there, full of an astonishing variety of questions and puzzles. Today's guest, Janna Levin, is a physicist who has delved into some of the trippiest aspects of cosmology and gr...

17 Des 20181h 8min

26 | Ge Wang on Artful Design, Computers, and Music

26 | Ge Wang on Artful Design, Computers, and Music

Everywhere around us are things that serve functions. We live in houses, sit on chairs, drive in cars. But these things don't only serve functions, they also come in particular forms, which may be emo...

10 Des 20181h 10min

25 | David Chalmers on Consciousness, the Hard Problem, and Living in a Simulation

25 | David Chalmers on Consciousness, the Hard Problem, and Living in a Simulation

The "Easy Problems" of consciousness have to do with how the brain takes in information, thinks about it, and turns it into action. The "Hard Problem," on the other hand, is the task of explaining our...

3 Des 20181h 22min

24 | Kip Thorne on Gravitational Waves, Time Travel, and Interstellar

24 | Kip Thorne on Gravitational Waves, Time Travel, and Interstellar

I remember vividly hosting a colloquium speaker, about fifteen years ago, who talked about the LIGO gravitational-wave observatory, which had just started taking data. Comparing where they were to whe...

26 Nov 20181h 19min

23 | Lisa Aziz-Zadeh on Embodied Cognition, Mirror Neurons, and Empathy

23 | Lisa Aziz-Zadeh on Embodied Cognition, Mirror Neurons, and Empathy

Brains are important things; they're where thinking happens. Or are they? The theory of "embodied cognition" posits that it's better to think of thinking as something that takes place in the body as a...

19 Nov 20181h 7min

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