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)

266 | Christoph Adami on How Information Makes Sense of Biology

266 | Christoph Adami on How Information Makes Sense of Biology

Evolution is sometimes described -- not precisely, but with some justification -- as being about the "survival of the fittest." But that idea doesn't work unless there is some way for one generation t...

19 Feb 20241h 20min

AMA | February 2024

AMA | February 2024

Welcome to the February 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Pa...

12 Feb 20243h 24min

265 | John Skrentny on How the Economy Mistreats STEM Workers

265 | John Skrentny on How the Economy Mistreats STEM Workers

Universities and their students are constantly being encouraged to produce more graduates majoring in STEM fields -- science, technology, engineering, and mathematics. That's the kind of training that...

5 Feb 20241h 20min

264 | Sabine Stanley on What's Inside Planets

264 | Sabine Stanley on What's Inside Planets

The radius of the Earth is over 6,000 kilometers, but the deepest we've ever dug below the surface is only about 12 km. Yet we have a quite reliable idea of the structure of the Earth's interior -- in...

29 Jan 20241h 12min

263 | Chris Quigg on Symmetry and the Birth of the Standard Model

263 | Chris Quigg on Symmetry and the Birth of the Standard Model

Einstein's theory of general relativity is distinguished by its singular simplicity and beauty. The Standard Model of Particle Physics, by contrast, is a bit of a mess. So many particles and interacti...

22 Jan 20241h 26min

262 | Eric Schwitzgebel on the Weirdness of the World

262 | Eric Schwitzgebel on the Weirdness of the World

Scientists and philosophers sometimes advocate pretty outrageous-sounding ideas about the fundamental nature of reality. (Arguably I have been guilty of this.) It shouldn't be surprising that reality,...

15 Jan 20241h 20min

261 | Sanjana Curtis on the Origins of the Elements

261 | Sanjana Curtis on the Origins of the Elements

In mid-20th-century cosmology, there was a debate over the origin of the chemical elements. Some thought that they could be produced in the Big Bang, while others argued that they were made inside sta...

8 Jan 20241h 7min

260 | Ricard Solé on the Space of Cognitions

260 | Ricard Solé on the Space of Cognitions

Octopuses, artificial intelligence, and advanced alien civilizations: for many reasons, it's interesting to contemplate ways of thinking other than whatever it is we humans do. How should we think abo...

1 Jan 20241h 10min

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