Particles of Thought

Latest Episodes:

How Dogs Talk Sep 15, 2026

Show notes

Federico Rossano didn't care about talking dogs until science made it impossible to ignore. The cognitive scientist joins Hakeem to reveal how a viral social media trend turned into the largest citizen-science study of animal communication ever conducted, tracking over 10,000 dogs and 700 cats across 47 countries. But how can you trust a study done by volunteers from around the world? Federico shares how he secured quantity and quality data and the messages dogs want to share.
Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Federico Rossano is an Associate Professor of Cognitive Science at UC San Diego and director of the Comparative Cognition Lab, where he studies communication and social cognition across humans, primates, dogs, and cats. He leads the world's largest study of button-trained pets, and his research is featured in the NOVA documentary Can Dogs Talk?

Full Interview: How to Save The “Doomsday Glacier” Sep 10, 2026

Show notes

Brent Minchew could have a plan to stop Thwaites Glacier, AKA the “Doomsday Glacier”, cold in its tracks. That’s good news because if this one glacier slips into the sea, it could flood coasts across the planet. The Caltech glaciologist covers what makes the “Doomsday Glacier” the single biggest wild card in sea level rise, the simple idea that could freeze it back to its bed, and his own improbable journey from 9/11 first responder to two of the world's top science institutions. It's a conversation about glaciers, courage, and what it takes to change the story.

Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Brent Minchew is a glaciologist and geophysicist at Caltech, where he leads research on the dynamics of ice sheets and sea level rise, and Chief Scientist at Arête Glacier Initiative. A former U.S. Marine, he now co-leads efforts to test real-world interventions that could stabilize the world's most vulnerable glaciers.

From Marine One to Mission Antarctica Sep 08, 2026

Show notes

Brent Minchew responded to the Pentagon on September 11th, 2001. Before he was a glaciologist at Caltech, he was a marine aboard the Marine One presidential helicopter and was one of the first on sight after the deadly attack. Brent joins Hakeem to trace his unlikely path from a working-class upbringing in Texas to a career studying the world's most extreme ice sheets. And he traces how his experience in the military informs his scientific mission planning and decision making.
Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Brent Minchew is a glaciologist and geophysicist at Caltech, where he leads research on the dynamics of ice sheets and sea -level rise, and Chief Scientist at Arête Glacier Initiative. A former U.S. Marine, he now co-leads efforts to test real-world interventions that could stabilize the world's most vulnerable glaciers.

Glacier Rescue Sep 03, 2026

Show notes

Brent Minchew has a plan that could stop the “Doomsday Glacier” in its tracks, and we don’t even need new technology to do it. The Caltech glaciologist returns to unveil an intervention that could save coasts around the world: refreezing Thwaites Glacier to its own bedrock using passive principles of physics. Brent walks Hakeem through the natural process that slows glaciers down, and lays out a plan to investigate if they can truly deploy it on the world's most precarious glacier.
Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

The Glacier That Could Change the World Sep 01, 2026

Show notes

Brent Minchew is an expert on the glacier that could devastate the world’s coastlines. As a glaciologist at Caltech, he's spent his career tracking Thwaites Glacier, AKA the "Doomsday Glacier." It’s roughly the size of Florida and already losing 50 billion tons of ice a year. Brent joins Hakeem to break down what scientists know – and don’t know – about the glacier that could determine our future. How certain is that “doom,” and how fast could it happen? They nerd out about what happens as glaciers slip into the sea, how satellites can measure glacier movement down to the millimeter from orbit, and how Thwaites might be the single most important glacier on the planet.
Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Full Interview: The Hidden Math Behind Everything Aug 27, 2026

Show notes

Jordan Ellenberg tells Hakeem that math isn't just about numbers. It's about everything. The mathematician and bestselling author shares how AI models are trained through trial and error, why geometry secretly governs everything from family trees to statistical correlation, and why uncertainty, not certainty, is the true language of the universe. From new dimensions to hurricanes we can't quite predict, Jordan and Hakeem trace math's fingerprints across physics, language, and daily life in a preview of his upcoming book, Don't Be Too Sure.

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Guest Bio:

Learn more aboutNOVA and visit our YouTube channel.

Jordan Ellenberg is a professor of mathematics at the University of Wisconsin–Madison, specializing in number theory and arithmetic algebraic geometry. He is the New York Times bestselling author of How Not to Be Wrong and Shape, and his forthcoming book, Don't Be Too Sure, arrives in 2027

Certainty Is Overrated Aug 25, 2026

Show notes

Jordan Ellenberg finds mathematical certainty overrated. Calming our fear of the unknown, the mathematician joins Hakeem to explore why math, contrary to popular belief, is less about proof and more about probability. He traces uncertainty's surprisingly recent arrival in mathematical history and its deep ties to quantum physics. Jordan also unpacks the difference between what's unknown and what's fundamentally unknowable, why hurricanes and earthquakes are "certain u

Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Jordan Ellenberg is a professor of mathematics at the University of Wisconsin–Madison, specializing in number theory and arithmetic algebraic geometry. He is the New York Times bestselling author of How Not to Be Wrong and Shape, and his forthcoming book, Don't Be Too Sure, arrives in 2027.

Next Dimension Geometry Aug 20, 2026

Show notes

Jordan Ellenberg says geometry isn’t about shapes. It’s about distance. In a tour of geometry far stranger than anything from high school, the mathematician breaks down how our ancient understanding of triangles evolved into the invisible architecture behind AI, family trees, and human relationships. Minds expand as we ask why the "closeness" between two ideas is a literal angle in a vast multi-dimensional space, and what can a 19th-century novella about a talking square teach us about worlds we'll never see?

Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Jordan Ellenberg is a professor of mathematics at the University of Wisconsin–Madison, specializing in number theory and arithmetic algebraic geometry. He is the New York Times bestselling author of How Not to Be Wrong and Shape, and his forthcoming book, Don't Be Too Sure, arrives in 2027.

AI’s Hidden Math Aug 18, 2026

Show notes

Jordan Ellenberg has good news: artificial intelligence is just math you can actually understand. The mathematician joins Hakeem to pull back the curtain on how large language models really work, revealing that the "miracle" of AI is closer to trial and error scaled up billions of times than anything resembling thought. Jordan breaks down why the process works so well, how every word becomes a point in a space with hundreds of dimensions, and why your chatbot's "personality" is engineered, not accidental.
Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Full Interview: Hobbits, Neanderthals, and Dragon Man Aug 13, 2026

Show notes

Ella Al-Shamahi explores what it means to be human. She reveals the surprising truth that our ancestors shared the planet with at least seven other human species as recently as 50,000 years ago. Ella and Hakeem dig into Neanderthal culture and the mysterious Denisovans who were identified from a single finger bone. Then Ella shares something more personal: her own journey from creationist to one of the leading voices in paleoanthropology.

Learn more aboutNOVA and visit our YouTube channel.

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Guest Bio:

Ella Al-Shamahi is a paleoanthropologist, explorer, and presenter based in London. She specializes in human evolution and has conducted fieldwork in some of the world's most dangerous and remote regions in search of fossil evidence of our earliest ancestors. She is a TED speaker and has appeared in numerous science documentaries, including hosting NOVA and BBC’s five-part series HUMAN, available on the PBS App and NOVA’s website.

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