Life is rich with moments of uncertainty, where we’re not exactly sure what’s going to happen next. We often find ourselves in situations where we have to choose between different kinds of uncertainty; maybe one option is very likely to have a “pretty good” outcome, while another has some probability for “great” and some for “truly awful.” In such circumstances, what’s the rational way to choose? Is it rational to go to great lengths to avoid choices where the worst outcome is very bad? Lara Buc...
Dec 12, 2022•1 hr 17 min•Ep. 220
Welcome to the December 2022 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 Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy! Remember that I take a holiday bre...
Dec 05, 2022•3 hr 16 min
It’s easy enough to proclaim that we are curious creatures, but what does that really mean? What kinds of curiosity are there? And how does curiosity arise in our brains? Perry Zurn and Dani Bassett are a philosopher and neuroscientist, respectively (as well as twins), whose new book Curious Minds: The Power of Connection explores these questions through an interdisciplinary lens. We break down the different ways that curiosity can manifest — collecting and creating loose knowledge n...
Nov 28, 2022•1 hr 3 min•Ep. 219
Stephen Hawking’s discoveries of black hole radiation, entropy, and the information-loss problem have both taught us an enormous amount about the relationship between quantum mechanics and gravity, and also left us with some knotty puzzles. One major insight is the holographic principle: the information describing a black hole can be thought of as living on the event horizon (the two-dimensional boundary of the hole), rather than distributed throughout its volume, as normal physics would lead us...
Nov 21, 2022•1 hr 22 min•Ep. 218
Why do people voluntarily hand over authority to a government? Under what conditions should they do so? These questions are both timeless and extremely timely, as modern democratic governments struggle with stability and legitimacy. They also bring questions from moral and political philosophy into conversations with empirically-minded social science. Margaret Levi is a leading political scientist who has focused on political economy and the nature of trust in government and other in...
Nov 14, 2022•1 hr 21 min•Ep. 217
Welcome to the November 2022 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 Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy! Support Mindscape on Patreon...
Nov 07, 2022•3 hr
People have a complicated relationship to mathematics. We all use it in our everyday lives, from calculating a tip at a restaurant to estimating the probability of some future event. But many people find the subject intimidating, if not off-putting. John Allen Paulos has long been working to make mathematics more approachable and encourage people to become more numerate. We talk about how people think about math, what kinds of math they should know, and the role of stories and narrative to make ...
Oct 31, 2022•1 hr 11 min•Ep. 216
The founders of statistical mechanics in the 19th century faced an uphill battle to convince their fellow physicists that the laws of thermodynamics could be derived from the random motions of microscopic atoms. This insight turns out to be even more important than they realized: the emergence of patterns characterizing our macroscopic world relies crucially on the increase of entropy over time. Barry Loewer has (in collaboration with David Albert) been developing a theory of the Mentaculu...
Oct 24, 2022•2 hr 34 min•Ep. 215
It’s a big universe we live in, so it comes as no surprise that big numbers are needed to describe it. There are roughly 10^22 stars in the observable universe, and about 10^88 particles altogether. But these numbers are nothing compared to some of the truly ginormous quantities that mathematicians have found to talk about, with inscrutable names like Graham’s Number and TREE(3). Could such immense numbers have any meaningful relationship with the physical world? In hi...
Oct 17, 2022•1 hr 16 min•Ep. 214
Welcome to the October 2022 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 Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy! Support Mindscape on Patreon ...
Oct 10, 2022•3 hr 1 min
With communication satellites, weather satellites, GPS, and much more, what happens in space is already important to our lives here on Earth. And the importance of space is only going to grow as we increase the presence of humans, whether in Earth orbit or beyond. So the questions of what laws govern activity in space, and how nations and institutions should practice good governance more generally, are becoming increasingly urgent. Timiebi Aganaba is an academic and space lawyer who has experien...
Oct 03, 2022•1 hr 16 min•Ep. 213
The detection of gravitational waves from inspiraling black holes by the LIGO and Virgo collaborations was rightly celebrated as a landmark achievement in physics and astronomy. But ultra-precise ground-based observatories aren’t the only way to detect gravitational waves; we can also search for their imprints on the timing of signals from pulsars scattered throughout our galaxy. Chiara Mingarelli is a member of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) &n...
Sep 26, 2022•1 hr 27 min•Ep. 212
My little pandemic-lockdown contribution to the world was a series of videos called The Biggest Ideas in the Universe . The idea was to explain physics in a pedagogical way, concentrating on established ideas rather than speculations, with the twist that I tried to include and explain any equations that seemed useful, even though no prior mathematical knowledge was presumed. I’m in the process of writing a series of three books inspired by those videos, and the first one is com...
Sep 19, 2022•2 hr 51 min•Ep. 211
What’s the fastest way to get a human being around a racetrack, if we ignore all the rules of racing? How many pages would you have to read to absorb all of the government laws that apply to you? It’s hard to imagine a better person to tackle these kinds of slightly-askew questions than Randall Munroe, creator of the xkcd webcomic. He collected some answers in his book What If? , and has released a sequel, What If? 2 . We dive into how one goes about choosing the right qu...
Sep 12, 2022•1 hr 8 min•Ep. 210
People throughout history have imagined ideal societies of various sorts. As the twentieth century dawned, advances in manufacturing and communication arguably brought the idea of utopia within our practical reach, at least as far as economic necessities are concerned. But we failed to achieve it, to say the least. Brad DeLong’s new book, Slouching Towards Utopia: An Economic History of the Twentieth Century , investigates why. He compares the competing political and economic systems that ...
Sep 05, 2022•1 hr 24 min•Ep. 209
Welcome to the September 2022 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 Patrons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy! Support Mindscape on Patreon...
Aug 29, 2022•4 hr 30 min
There is no human endeavor that does not have a theory of it — a set of ideas about what makes it work and how to do it well. Music is no exception, popular music included — there are reasons why certain keys, chord changes, and rhythmic structures have proven successful over the years. Nobody has done more to help people understand the theoretical underpinnings of popular music than today’s guest, Rick Beato. His YouTube videos dig into how songs work and what makes them great. We talk about mu...
Aug 22, 2022•1 hr 11 min•Ep. 208
It’s always a little humbling to think about what affects your words and actions might have on other people, not only right now but potentially well into the future. Now take that humble feeling and promote it to all of humanity, and arbitrarily far in time. How do our actions as a society affect all the potential generations to come? William MacAskill is best known as a founder of the Effective Altruism movement, and is now the author of What We Owe the Future . In this new bo...
Aug 15, 2022•2 hr 42 min•Ep. 207
Evolution by natural selection is one of the rare scientific theories that resonates within the wider culture as much as it does within science. But as much as people know about evolution, we also find the growth of corresponding myths. Simon Conway Morris is a paleontologist and evolutionary biologist who’s new book is From Extraterrestrials to Animal Minds: Six Myths of Evolution . He is known as a defender of evolutionary convergence and adaptationism — even when there is a mass extinct...
Aug 08, 2022•1 hr 17 min•Ep. 206
Welcome to the August 2022 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 Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Here is a link to the Mindscape...
Aug 01, 2022•3 hr 7 min
The idea of an “interest rate” might seem mundane and practical, in comparison to our usual topics around here, but there is a profound philosophical idea lurking in the background: if you lend me money now against the promise of me paying you back more in the future, I am relating the different values that a certain sum has to me at different moments in time. Traditionally, the interest rates set by the government have been a major tool for influencing the economy, but in recent decades they ha...
Jul 25, 2022•1 hr 19 min•Ep. 205
Recent years have seen a revolution in the study of exoplanets, planets that orbit stars other than the Sun (or don’t orbit stars at all). After a few tentative detections in the 1990s, dedicated instruments in the 2000s have now pushed the number of known exoplanets into the thousands, enough to begin to categorize their distribution and properties. Today’s guest is John Asher Johnson, one of the leaders in this field. We talk about the various different ways that exoplanets can be detected, wh...
Jul 18, 2022•1 hr 15 min•Ep. 204
We describe the world using language — we can’t help it. And we all know that ordinary language is an imperfect way of communicating rigorous scientific statements, but sometimes it’s the best we can do. Linguist N.J. Enfield argues that the difficulties run more deeply than we might ordinarily suppose. We use language as a descriptive tool, but its origins are found in more social practices — communicating with others to express our feelings and persuade them to agree with us. As such, the very...
Jul 11, 2022•1 hr 24 min•Ep. 203
Welcome to the July 2022 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Big news this week! Mindscap...
Jul 04, 2022•3 hr 26 min
The United States is suffering from an epidemic of tragic gun violence. While a political debate rages around the topic of gun control, it remains important to understand the causes and possible remedies for gun violence within the current system. Andrew Papachristos is a sociologist who uses applied network science to study patterns of street violence in urban areas. His research shows that such violence is highly non-random; knowing something about the social networks of perpetrators and victi...
Jun 27, 2022•1 hr 15 min•Ep. 202
All of us construct models of the world, and update them on the basis of evidence brought to us by our senses. Scientists try to be more rigorous about it, but we all do it. It’s natural that this process will depend on what form that sensory input takes. We know that animals, for example, are typically better or worse than humans at sight, hearing, and so on. And as Ed Yong points out in his new book, it goes far beyond that, as many animals use completely different sensory modalities, from ech...
Jun 20, 2022•1 hr 9 min•Ep. 201
Welcome to the June 2022 Ask Me Anything episode of Mindscape! We are inaugurating a slightly different publication schedule, in which these monthly AMA will take the place of one of the regular Monday episodes, rather than being in addition to all of them. A slight tweak that will hopefully make my obligations a little more manageable. These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by...
Jun 13, 2022•3 hr 5 min
The 200th episode of Mindscape! Thanks to everyone for sticking around for this long. To celebrate, a solo episode discussing a set of issues naturally arising at the intersection of philosophy and physics: how to think about probabilities and expectations in a multiverse. Here I am more about explaining the issues than offering correct answers, although I try to do a bit of that as well. Support Mindscape on Patreon . References: Guth, “ Inflation and Eternal Inflation “ Weinberg, “ Livin...
Jun 06, 2022•2 hr 15 min•Ep. 200
Time is everywhere, pervading each aspect of intellectual inquiry — from physics to philosophy to biology to psychology, and all the way up to politics. Considerations of time help govern a nation’s self-conception, decide who gets to vote and enjoy other privileges, and put limits on the time spent in office. Not to mention the role of time as a precious commodity, one that is used up every time we stand in line or fill out a collection of forms. Elizabeth Cohen shines a light on the role of ti...
May 30, 2022•1 hr 13 min•Ep. 199
The origin of life here on Earth was an important and fascinating event, but it was also a long time ago and hasn’t left many pieces of direct evidence concerning what actually happened. One set of clues we have comes from processes in current living organisms, especially those processes that seem extremely common. The Krebs cycle, the sequence of reactions that functions as a pathway for energy distribution in aerobic organisms, is such an example. I talk with biochemist about the importance of...
May 23, 2022•1 hr 25 min•Ep. 198
