Richard Feynman once dubbed turbulence “the last unsolved problem of classical physics.” Beyond the Navier–Stokes equations, no comprehensive statistical framework exists to predict how fluids spin, eddy, and cascade energy—whether in galactic jets, ocean currents, or the swirl of your morning coffee. But that might all be changing.

In this episode, I sit down with theoretical physicist Sasha Migdal, who emerged from retirement with a bold, loop‑equation approach to turbulence. His formalism recasts the Navier–Stokes equations as an infinite number of linear, readily solvable equations that track circulation around closed loops in the fluid—offering, for the first time, a tractable statistical framework for chaotic flow.

We chart Sasha’s remarkable journey: from a promising career at the Landau Institute and Russian Space Institutes, where he resisted KGB pressure to compromise his work, to his defection to the United States in the late 1980s. We discuss his time outside of physics, and then delve into his return, and his novel approach to solving Navier–Stokes. 

Since we recorded, his theory has advanced rapidly. A rigorous proof now shows that it is the solution 

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►For a more technical overview of Sasha's work you can check out his recent talk at the IAS:

In this conversation I ask Professors Sam Richards & Laurey Mulvey about some of the most controversial topics concerning race and ethnicity in the US today.

Is White Privilege a useful term that helps build understanding and facilitates conversation, or does it generate social tension and make poor white people feel gaslit? What is DEI, why is it so contentious, and can it be implemented effectively? What makes the N-word and blackface so triggering? Why are US racial social norms so culturally dominant and readily exported? 

Sam Richards is a sociologist and Teaching Professor at Penn State and a Distinguished Professor at Konkuk University in Seoul, Korea. He runs SOC119, which is the largest race, ethnicity and cultural relations course in the world. Every Tuesday and Thursday afternoon his class is live streamed to 370,000 subscribers from around the world, and his classes have had over 400 million views. His willingness to challenge orthodox thinking led him to be named one of the “101 Most Dangerous 

Laurie Mulvey is the director and co-founder of the World in Conversation Center for Public Diplomacy at Penn State, which is the largest dialogue center in the United States, hosting more than 17,000 participants each academic year. The Center has worked with the UNDP, UNESCO, and NATO, along with organizations and universities in Afghanistan, Pakistan, Iran, Palestinian Territories, Israel, Kuwait, Qatar, China, Haiti, Saudi Arabia, and twelve nations in the NATO Alliance to host dialogues between people separated by vast distances and borders. Laurie is a master facilitator, focused on moderating beneficial conversations between different groups on some of the most difficult, hot button topics.

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

What is Holography and how does it help us Quantize gravity? In this conversation I speak with Pedro Vieira, one of the worlds leading experts on holographic dualities and their application in quantum gravity.

We start our discussion with a few standard but big questions, like why is quantum gravity difficult, what is quantum field theory, and what is gauge symmetry. We then dive into the topic of holography, which in broad and provocative terms is the idea that our universe and everything in it might be a hologram projected from some lower dimensional quantum theory. That is, there might be a duality between the mathematics that describes our world including gravity and the mathematics that describes a world with quantum mechanics and without gravity in one dimension lower. If such a duality were true, then it might provide a radial way of side stepping all of the usual difficulties of quantizing gravity. 

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

In this conversation I speak with Sam Bendett, one of the worlds leading experts on Russian weapons development and capabilities, drones, AI, and the war in Ukraine. Sam is an advisor for the Center for Naval Analyses and an adjunct senior fellow at the Center for a New American Security, an honorary “mad scientist” with the Mad Scientist Initiative of the U.S. Army Training and Doctrine Command, and a Russian military autonomy and artificial intelligence subject matter expert for the DOD’s Defense Systems Information Analysis Center.

We discuss drone warfare in Ukraine as it stands today. We cover the range of systems being fielded, counter measures, AI capabilities, what life is like for drone operators and soldiers on the line of contact, drone production pipelines and supply, and more.

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

Will we ever have an AI for president? In this episode of the podcast I speak with Pedro Domingos about the impact of AI on society, industry, and politics. Pedro is professor emeritus of computer science and engineering at the University of Washington and co-founded the International Machine Learning Society. He is also the Author of `The Master Algorithm' and `2040: A Silicon Valley Satire'. This episode is not a paid advertisement for Pedro's books, but we use his book `2040' to set the context for the discussion. 

We discuss the hype and fear surrounding AI and the future of tech, and Pedro gives an insiders view into the realities of AI development and impact. In his view AI is a human made tool. It isn't going to take over the planet like the terminator, but it will be something that is used by humans to shift the balance of power in society, industry, and politics. A particularly interesting aspect of the discussion surrounds digital twins. Imagine a world in which dating apps are replaced with a digital platform in which your digital twin simulates dates, and even entire lives with the digital twins of potential partners. Users would then go on physical dates with the top performing selection. This same idea could be extended to predicting crime, presidential election outcomes, and more. All of a sudden the simulation hypothesis doesn't seem to crazy, when simulations are used to predict future outcomes in the real world.

Another key topic in this conversation is that of `wokism'. Pedro discusses `wokism' as a new iteration of cultural marxism, an ideology that reinterprets the dynamics of class struggle through cultural and identity-based lenses. While the creation of wealth in a society is not inherently a zero-sum game—where one person’s gain is necessarily another’s loss— the division and redistribution of that wealth that has been created is a zero-sum conflict. Pedro suggests that `wokism' is an attempt to shift power and resources within society, but where the division between the oppressed and the privileged is identity based.

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

In this conversation I speak with renegade economist and creator of doughnut economics Kate Raworth. Kate is a Senior Associate at Oxford University’s Environmental Change Institute, where she teaches on the Masters in Environmental Change and Management. She is also Professor of Practice at Amsterdam University of Applied Sciences.

We speak about economic transformation, and re-imagining economic possibilities for the 21st century. What should we design our economic system to do? Growth in GDP is a nice target to aim for because it is simple, but it doesn't do a very good job of capturing all of the economic externalities associated with market contracts, and in particular the impact of doing business on the environment and human well being. Our economies are beginning to run up against our planets boundaries, and it is becoming increasingly apparent that our planet is finite. So what should our target be if not for endless growth in GDP at the expense of our only known habitable planet?

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

This conversation is the second part of a two part mini-series on Regenerative cattle farming. The question is: Does raising cattle really have to be so damaging to the environment? Can cattle be integrated into a natural system that sequesters carbon from the atmosphere, and if so what would that system look like?

Joel Salatin segregates his land into small fenced off areas, which he rotates his cattle through. By moving his herd routinely he gives grass and other wild vegetation optimal time to grow and absorb carbon, and for the cattle to disperse their excreta such that it is optimally absorbed into the fields. By dispersing the impact of his cattle, and introducing a number of complimentary species he is able to reduce the impact of disease and pests without the use of insecticides, pesticides, and other chemical based management approaches. This keeps the soil alive such that smaller organisms can work the carbon deposited by the cattle into the soil. The claim is that this approach is able to sequester carbon. Its also far better for the animals, and leads to a better end product.

At 21:00 Joel mentions a connection between autism, and nutrition. The exact causes of autism are not fully understood, but research points to a combination of genetic, environmental, and possibly prenatal influences. Maternal nutrition during pregnancy (including adequate levels of folic acid and vitamin D), gut health, and nutritional deficiencies may influence autism-related symptoms, though no definitive dietary cause has been identified and specialized diets show mixed evidence and require further research.

At 1:16:00  Joel mentions health comparisons between Fake meat Substitutes and real beef. I don't know much about that topic yet, but here is somewhere to start looking if you are interested:

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

In this conversation I speak with Will Harris, who is a fourth generation cattle farmer. Will originally ran a standard industrial farm, but increasingly became dissatisfied by the welfare of his animals. That started a journey to change the way his farm ran, and over the years he has converted his operation piece by piece into a regenerative farm. That means no more grain feed, no more confined feed lots, no more hormones, no more pesticides. The basic idea is to focus on improving the land in order to leave it better each year. Will has come up with a system that is not only better for the cattle and the consumer, but which also appears to be significantly better for the environment.

Its quite common to hear about the environmental problems caused by Beef production, including chemical runoff, loss of top soils, and methane from belches. But these problems are usually associated with intensive farming, where cattle are densely packed, and fed on grain. What does the story look like for regenerative practices? The claim is that when cattle are optimally rotated through paddocks,  their impact on the land is dispersed, and it reduces the need for pesticides, herbicides, hormones, and other pharmaceuticals (both in feed production, and within the herd itself). Solar energy goes into growing the grass, which captures carbon as it grows. Carbon is then processed by the herd on the field, and without wormer, and insecticides and other chemicals being used, a living soil is able to develop, which increases in carbon content over the years, drawing down carbon and fixing it in the soil. But what about methane production? Methanotrophs that metabolize methane are also found within healthy soils - and it might be the case that these species account for the methane produced by cattle.

Third party assessments appear to show that White Oak Pastures does significantly better than conventional intensive farming,  and within the margin of error of the study, there is a potential that the beef production is climate positive, storing more carbon in the soil than the pasture-raised cows emit during their lifetime: https://blog.whiteoakpastures.com/blog/carbon-negative-grassfed-beef

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and/or those of my guests.

In quantum mechanics the state of a physical system is described by a wavefunction, which provides information about the probabilities of various outcomes, such as finding a particle at a particular location in space. This differs dramatically from classical physics, where a particle is described by a definite position and momentum. As a result, quantum mechanics inherently involves a certain level of uncertainty. A key question is whether this uncertainty reflects a fundamental indeterminacy in reality itself or merely our limited knowledge of the physical system.

One possibility is that reality could be deterministic, and the wavefunction might simply describe statistical properties, much like temperature and pressure describe the collective behavior of gas molecules. In this view, the true state of the system would be governed by hidden variables—deterministic factors that remain unseen yet produce the probabilistic outcomes we observe in quantum experiments. The standard view, however, is that the universe itself is inherently probabilistic.  Furthermore, Bell’s theorem famously rules out “local hidden variable” models, suggesting to many that any such model must allow instantaneous causal influences between spatially separated objects. But is this standard picture as definitive as it seems?

In this episode of the podcast, I speak with Rob Spekkens, one of the world’s leading experts on the foundations of quantum mechanics. His research explores the idea that a quantum state may represent a state of incomplete knowledge rather than an objective state of reality. Many of the phenomena commonly associated with quantum mechanics—noncommutativity, interference, entanglement, wave-particle duality, and discrete energy levels—can, as Rob demonstrates, be modeled with classical toy models wherein each system has a determinate physical state but where we have incomplete knowledge of this state.. Rob suggests that quantum mechanics may not be as fundamentally different from classical physics as it initially appears. If we truly want to understand quantum reality, we should focus on isolating and investigating the "thin film" of phenomena that distinguish a quantum from a classical world. That's what we discuss in this episode. 

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and those of my guests.

Wheat, soy, corn, potatoes—did we really domesticate the best crops nature had to offer? In this episode of the podcast, I speak with geneticist Padraic J. Flood, who specializes in population and quantitative genetics. Padraic left academia and a position in vertical farming to pursue a dream: the domestication of the Aardaker.

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These conversations are supported by the Andrea von Braun foundation (http://www.avbstiftung.de/), as an exploration of the rich, exciting, connected, scientifically literate, and (most importantly) sustainable future of humanity. The Andrea von Braun Foundation has provided me with full creative freedom with their support. As such, the views expressed in these episodes are my own and those of my guests.