11 | Mike Brown on Killing Pluto and Replacing It with Planet 9

11 | Mike Brown on Killing Pluto and Replacing It with Planet 9

Few events in recent astronomical history have had the worldwide emotional resonance as the 2006 announcement that Pluto was no longer considered a planet, at least as far as the International Astronomical Union was concerned. The decision was a long time coming, but no person deserves more credit/blame for forcing the astronomical community's hand than Caltech astronomer Michael Brown. He and his team discovered a number of objects in the outer Solar System -- Eris, Haumea, Sedna, and others -- any of which was just as deserving of planetary status as Pluto. Rather than letting the planetary family proliferate without bound, astronomers decided that none of these objects dominated the orbits in which they moved, so none of them should be planets. Now Brown and his colleague Konstantin Batygin have found indirect evidence that there is another real planet far beyond Pluto's orbit -- which they have dubbed Planet Nine just to remind you that there are currently only eight. [smart_track_player url="http://traffic.libsyn.com/seancarroll/mike-brown.mp3" social_gplus="false" social_linkedin="true" social_email="true" hashtag="mindscapepodcast" ] Mike Brown received his Ph.D. in Astronomy from U.C. Berkeley in 1994, and is currently the Richard and Barbara Rosenberg Professor of Planetary Astronomy at Caltech. He shared the Kavli Prize in Astrophysics in 2012 for his discovery of major new objects in the outer Solar System, and in 2007 won Caltech's annual Feynman Teaching Prize. Home page Wikipedia page Blog Twitter How I Killed Pluto and Why It Had It Coming Online course, The Science of the Solar System Download Episode

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7 | Yascha Mounk on Threats to Liberal Democracy

7 | Yascha Mounk on Threats to Liberal Democracy

Both words in the phrase "liberal democracy" carry meaning, and both concepts are under attack around the world. "Democracy" means that they people rule, while "liberal" (in this sense) means that the...

30 Juli 20181h 5min

6 | Liv Boeree on Poker, Aliens, and Thinking in Probabilities

6 | Liv Boeree on Poker, Aliens, and Thinking in Probabilities

Poker, like life, is a game of incomplete information. To do well in such a game, we have to think in terms of probabilities, unpredictable strategies, and Bayesian inference. These are ideas that pla...

23 Juli 20181h 10min

5 | Geoffrey West on Networks, Scaling, and the Pace of Life

5 | Geoffrey West on Networks, Scaling, and the Pace of Life

If you scale up an animal to twice its height, keeping everything else proportionate, its volume and weight become eight times as much. Such a scaling relation was used by J.B.S. Haldane in his famous...

16 Juli 20181h 23min

4 |  Anthony Pinn on Humanism, Theology, and the Black Community

4 | Anthony Pinn on Humanism, Theology, and the Black Community

According to atheism, God does not exist. But religions have traditionally done much more than simply proclaim God's existence: they have provided communities, promoted the arts, handed down moral gui...

12 Juli 20181h

3 | Alice Dreger on Sexuality, Truth, and Justice

3 | Alice Dreger on Sexuality, Truth, and Justice

The human mind loves nothing more than to build mental boxes -- categories -- and put things into them, then refuse to accept it when something doesn't fit. Nowhere is this more clear than in the idea...

11 Juli 20181h 20min

2 | Carlo Rovelli on Quantum Mechanics, Spacetime, and Reality

2 | Carlo Rovelli on Quantum Mechanics, Spacetime, and Reality

Quantum mechanics and general relativity are the two great triumphs of twentieth-century theoretical physics. Unfortunately, they don't play well together -- despite years of effort, we currently lack...

10 Juli 20181h 12min

1 | Carol Tavris on Mistakes, Justification, and Cognitive Dissonance

1 | Carol Tavris on Mistakes, Justification, and Cognitive Dissonance

For the first full episode of Mindscape, it's an honor to welcome social psychologist Carol Tavris. Her book with co-author Eliot Aronson, Mistakes Were Made (But Not By Me), explores the effect that ...

4 Juli 20181h 11min

Welcome to the Mindscape Podcast!

Welcome to the Mindscape Podcast!

I've decided to officially take the plunge into the world of podcasting. The new show will be called Mindscape, and will mostly consist of me talking to smart people about interesting ideas. (Occasion...

1 Juli 201816min

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