Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas15 Okt 2018

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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Episoder(427)

226 | Johanna Hoffman on Speculative Futures of Cities

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AMA | February 2023

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6 Feb 20233h 7min

225 | Michael Tomasello on The Social Origins of Cognition and Agency

Human beings have developed wondrous capacities to take in information about the world, mull it over, think about a suite of future implications, and decide on a course of action based on those delibe...

30 Jan 20231h 22min

224 | Edward Tufte on Data, Design, and Truth

So you have some information — how are you going to share it with and present it to the rest of the world? There has been a long history of organizing and displaying information without putting too mu...

23 Jan 20231h 16min

223 | Tania Lombrozo on What Explanations Are

There are few human impulses more primal than the desire for explanations. We have expectations concerning what happens, and when what we experience differs from those expectations, we want to know th...

16 Jan 20231h 10min

222 | Andrew Strominger on Quantum Gravity and the Real World

Quantum gravity research is inspired by experiment — all of the experimental data that supports quantum mechanics, and supports general relativity — but it's only inspiration, not detailed guidance. S...

9 Jan 20231h 24min

221 | Adam Bulley on How Mental Time Travel Makes Us Human

One of the most powerful of all human capacities is the ability to imagine ourselves in hypothetical situations at different times. We can remember the past, but also conjure up possible futures that ...

2 Jan 20231h 20min

Holiday Message 2022: Thinking Really Slowly

Welcome to that beloved Mindscape annual tradition, the Holiday Message. An opportunity for a quicker and less-well-thought-out solo episode to round off another year. Ironically, this year the theme ...

19 Des 202247min