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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95 | Liam Kofi Bright on Knowledge, Truth, and Science

95 | Liam Kofi Bright on Knowledge, Truth, and Science

Everybody talks about the truth, but nobody does anything about it. And to be honest, how we talk about truth — what it is, and how to get there — can be a little sloppy at times. Philosophy to the re...

4 Touko 20201h 35min

94 | Stuart Russell on Making Artificial Intelligence Compatible with Humans

94 | Stuart Russell on Making Artificial Intelligence Compatible with Humans

Artificial intelligence has made great strides of late, in areas as diverse as playing Go and recognizing pictures of dogs. We still seem to be a ways away from AI that is "intelligent" in the human s...

27 Huhti 20201h 27min

93 | Rae Wynn-Grant on Bears, Humans, and Other Predators

93 | Rae Wynn-Grant on Bears, Humans, and Other Predators

Human beings have a strange fascination with dangerous, predatory animals — bears, lions, wolves, sharks, and more. The top of the food chain is an interesting and precarious place to live; while you ...

20 Huhti 20201h 2min

92 | Kevin Hand on Life Elsewhere in the Solar System

92 | Kevin Hand on Life Elsewhere in the Solar System

It's hard doing science when you only have one data point, especially when that data point is subject to an enormous selection bias. That's the situation faced by people studying the nature and preval...

13 Huhti 20201h 56min

91 | Scott Barry Kaufman on the Psychology of Transcendence

91 | Scott Barry Kaufman on the Psychology of Transcendence

If one of the ambitious goals of philosophy is to determine the meaning of life, one of the ambitious goals of psychology is to tell us how to achieve it. An influential work in this direction was Abr...

6 Huhti 20201h 19min

90 | David Kaiser on Science, Money, and Power

90 | David Kaiser on Science, Money, and Power

Science costs money. And for a brief, glorious period between the start of the Manhattan Project in 1939 and the cancellation of the Superconducting Super Collider in 1993, physics was awash in it, la...

30 Maalis 20201h 34min

89 | Lera Boroditsky on Language, Thought, Space, and Time

89 | Lera Boroditsky on Language, Thought, Space, and Time

What direction does time point in? None, really, although some people might subconsciously put the past on the left and the future on the right, or the past behind themselves and the future in front, ...

23 Maalis 20201h 28min

Tara Smith on Coronavirus, Pandemics, and What We Can Do

Tara Smith on Coronavirus, Pandemics, and What We Can Do

This is a special episode of Mindscape, thrown together quickly. Many thanks to Tara Smith for joining me on short notice. Tara is an epidemiologist, and a great person to talk to about the novel coro...

18 Maalis 20201h 20min

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