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

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80 | Jenann Ismael on Connecting Physics to the World of Experience

80 | Jenann Ismael on Connecting Physics to the World of Experience

Physics is simple; people are complicated. But even people are ultimately physical systems, made of particles and forces that follow the rules of the Core Theory. How do we bridge the gap from one kin...

20 Tammi 20201h 26min

79 | Sara Imari Walker on Information and the Origin of Life

79 | Sara Imari Walker on Information and the Origin of Life

We are all alive, but "life" is something we struggle to understand. How do we distinguish a "living organism" from an emergent dynamical system like a hurricane, or a resource-consuming chemical reac...

13 Tammi 20201h 23min

78 | Daniel Dennett on Minds, Patterns, and the Scientific Image

78 | Daniel Dennett on Minds, Patterns, and the Scientific Image

Wilfrid Sellars described the task of philosophy as explaining how things, in the broadest sense of term, hang together, in the broadest sense of the term. (Substitute "exploring" for "explaining" and...

6 Tammi 20202h 1min

Holiday Message 2019: On Publishing Books

Holiday Message 2019: On Publishing Books

Welcome to the second annual Mindscape Holiday Message! No substantive content or deep ideas, just me talking a bit about the state of the podcast and what's on my mind. Since the big event for me in ...

22 Joulu 20191h 6min

77 | Azra Raza on The Way We Should Fight Cancer

77 | Azra Raza on The Way We Should Fight Cancer

In the United States, more than one in five deaths is caused by cancer. The medical community has put enormous resources into fighting this disease, yet its causes and best treatments continue to be a...

16 Joulu 20191h 22min

76 | Ned Hall on Possible Worlds and the Laws of Nature

76 | Ned Hall on Possible Worlds and the Laws of Nature

It's too easy to take laws of nature for granted. Sure, gravity is pulling us toward Earth today; but how do we know it won't be pushing us away tomorrow? We extrapolate from past experience to future...

9 Joulu 20191h 25min

75 | Max Tegmark on Reality, Simulation, and the Multiverse

75 | Max Tegmark on Reality, Simulation, and the Multiverse

We've talked a lot recently about the Many Worlds of quantum mechanics. That's one kind of multiverse that physicists often contemplate. There is also the cosmological multiverse, which we talked abou...

2 Joulu 20191h 11min

74 | Stephen Greenblatt on Stories, History, and Cultural Poetics

74 | Stephen Greenblatt on Stories, History, and Cultural Poetics

An infinite number of things happen; we bring structure and meaning to the world by making art and telling stories about it. Every work of literature created by human beings comes out of an historical...

25 Marras 20191h 6min

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