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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115 | Netta Engelhardt on Black Hole Information, Wormholes, and Quantum Gravity

115 | Netta Engelhardt on Black Hole Information, Wormholes, and Quantum Gravity

Stephen Hawking made a number of memorable contributions to physics, but perhaps his greatest was a puzzle: what happens to information that falls into a black hole? The question sits squarely at the ...

21 Syys 20201h 27min

114 | Angela Chen on Asexuality in a Sex-Preoccupied World

114 | Angela Chen on Asexuality in a Sex-Preoccupied World

Sexuality is, and always has been, a topic that is endlessly fascinating but also contentious. You might think that asexuality would be more straightforward, but you'd be wrong. Asexual people, or "ac...

14 Syys 20201h 8min

113 | Cailin O'Connor on Game Theory, Evolution, and the Origins of Unfairness

113 | Cailin O'Connor on Game Theory, Evolution, and the Origins of Unfairness

You can't always get what you want, as a wise person once said. But we do try, even when someone else wants the same thing. Our lives as people, and the evolution of other animals over time, are shape...

7 Syys 20201h 19min

112 | Fyodor Urnov on Gene Editing, CRISPR, and Human Engineering

112 | Fyodor Urnov on Gene Editing, CRISPR, and Human Engineering

Not too long ago nobody carried a mobile phone; now almost everybody does. That's the kind of rate of rapid progress we're seeing with our ability to directly edit genomes. With the use of CRISPR-Cas9...

31 Elo 20201h 20min

111 | Nick Bostrom on Anthropic Selection and Living in a Simulation

111 | Nick Bostrom on Anthropic Selection and Living in a Simulation

Human civilization is only a few thousand years old (depending on how we count). So if civilization will ultimately last for millions of years, it could be considered surprising that we've found ourse...

24 Elo 20201h 20min

110 | Neil Johnson on Complexity, Conflict, and Infodemiology

110 | Neil Johnson on Complexity, Conflict, and Infodemiology

Physicists have traditionally simplified systems as much as possible, in order to shed light on fundamental properties. But small, simple parts build up into large, complex wholes. Are there new rules...

17 Elo 20201h 23min

109 | Jason Torchinsky on Our Self-Driving Future

109 | Jason Torchinsky on Our Self-Driving Future

It's easy to foresee that technological progress will change how we live; it's much harder to anticipate exactly how. Self-driving cars represent an enormous technological challenge, but one that is p...

10 Elo 20201h 18min

108 | Carl Bergstrom on Information, Disinformation, and Bullshit

108 | Carl Bergstrom on Information, Disinformation, and Bullshit

We are living, in case you haven't noticed, in a world full of bullshit. It's hard to say whether the amount is truly increasing, but it seems that everywhere you look someone is trying to convince yo...

3 Elo 20201h 24min

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