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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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

107 | Russ Shafer-Landau on the Reality of Morality

107 | Russ Shafer-Landau on the Reality of Morality

Despite occasional and important disagreements, most people are in rough agreement about what it means to be moral, to do the right thing. There's much less agreement about why we should be moral, or ...

27 Heinä 20201h 30min

106 | Stuart Bartlett on What "Life" Means

106 | Stuart Bartlett on What "Life" Means

Someday, most likely, we will encounter life that is not as we know it. We might find it elsewhere in the universe, we might find it right here on Earth, or we might make it ourselves in a lab. Will w...

20 Heinä 20201h 25min

105 | Ann-Sophie Barwich on the Science and Philosophy of Smell

105 | Ann-Sophie Barwich on the Science and Philosophy of Smell

We gather empirical evidence about the nature of the world through our senses, and use that evidence to construct an image of the world in our minds. But not all senses are created equal; in practice,...

13 Heinä 20201h 17min

104 | David Rosen and Scott Miles on the Neuroscience of Music and Creativity

104 | David Rosen and Scott Miles on the Neuroscience of Music and Creativity

Creativity is one of those things that we all admire but struggle to define or make concrete. Music provides a useful laboratory in which to examine what creativity is all about — how do people become...

6 Heinä 20201h 26min

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