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 to the Navier–Stokes (NS) loop equation. The theory has also been extended to magnetohydrodynamics and turbulent mixing. Recent large-scale direct numerical simulations (DNS) match the theoretical predictions with even greater accuracy.

►Watch On YouTube: https://youtu.be/BNORi7mxxzg

►Find out more about Sasha's work here: https://alexandermigdal.com/ https://sashamigdal.github.io/TurbulenceDuality/index.html

►For a more technical overview of Sasha's work you can check out his recent talk at the IAS: https://www.youtube.com/watch?v=mgvGA6q7oPY

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 Professors in America” and together with Laurie Mulvey is one of the “parents of radical empathy.”

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.

►Watch on YouTube: https://youtu.be/wd2DytWSAYE

►Find out more about Sam's work here: https://sociology.la.psu.edu/people/sam-richards/ ►Find out more about Laurie's work here: https://sociology.la.psu.edu/people/laurie-mulvey/

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.

►Watch on YouTube: https://youtu.be/FdpVxLq_PAk

►Find out more about Pedro here: https://perimeterinstitute.ca/people/pedro-vieira https://inspirehep.net/authors/1027784

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.