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Recent episodes
How Many Leaves Are on a Tree? | Kirk Johnson
Apr 29, 2026
1m 34s
Decoding the Great Pyramid
Apr 28, 2026
Unknown duration
The Air You Breathe Is Bacteria Poop | Peter Girguis
Apr 22, 2026
Unknown duration
The Fish That Could Walk | Sean B. Carrol
Apr 15, 2026
Unknown duration
When Whales Could Walk
Apr 14, 2026
Unknown duration
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| Date | Episode | Topics | Guests | Brands | Places | Keywords | Sponsor | Length | |
|---|---|---|---|---|---|---|---|---|---|
| 4/29/26 |  How Many Leaves Are on a Tree? | Kirk Johnson✨ | paleobotanyleaf counting+3 | Kirk Johnson | NOVAGBH | — | leavestree+3 | — | 1m 34s | |
| 4/28/26 |  Decoding the Great Pyramid | What engineering secrets lie within the Great Pyramid, and who really built it? Innovations like rope‑sewn boats, laser‑precise alignments, and hidden internal chambers reveal a building team with knowledge far ahead of its time. Uncover clues buried around Giza that point to a surprising truth about the workforce responsible for one of history’s greatest construction projects.To watch the full film, visit https://www.pbs.org/wgbh/nova/video/decoding-the-great-pyramid/Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 4/22/26 |  The Air You Breathe Is Bacteria Poop | Peter Girguis | Long before trees and grass, microbes were shaping our atmosphere. Evolutionary biologist Peter Girguis explains how ancient bacteria learned to split water for energy, and why their waste product changed Earth forever.For more, check out the extended interview with Peter Girguis.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 4/15/26 |  The Fish That Could Walk | Sean B. Carrol | How did animals first make the giant step from water to land? Evolutionary biologist Sean B. Carroll explains how the discovery of Tiktaalik—a fossil with both fish and limb-like features—revealed a key moment in evolution.For more, check out the extended interview with Sean B. Carroll.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 4/14/26 |  When Whales Could Walk | What if whales had legs? Once upon a time, they did. Sort of. An astonishing fossil trail shows that modern whales actually evolved from hooved land mammals. Whales still carry the fingerprints of this past, from their stomach anatomy to their swimming gait. Dive in to discover the wild story of how whales traded legs for fins, as we uncover clues about their ancestors, as well as their unlikely present-day relatives.To watch the full film, visit https://www.pbs.org/wgbh/nova/video/when-whales-could-walk/Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 4/8/26 |  How Close Can You Safely Get to a Black Hole? | Janna Levin | Black holes aren’t the cosmic monsters Hollywood makes them out to be. Astrophysicist Janna Levin explains why they’re so hard to detect, why they’re not as destructive as you might assume, and how you could safely orbit much closer than you think.For more, check out the extended interview with Janna Levin.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 4/1/26 |  A New Law of Nature? | Robert Hazen & Michael Wong | Could the universe be governed by a law we haven’t discovered yet? Mineralogist Robert Hazen and astrobiologist Michael Wong propose a new rule—the law of increasing functional information—to explain why complex systems evolve and why complexity keeps emerging over time.For more, check out the extended interview with Robert Hazen and Michael Wong.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/31/26 |  Arctic Sinkholes | What happens when the Arctic’s ancient freezer starts to fail? Scientists have uncovered the truth behind giant sinkholes exploding from the frozen ground in Siberia, and a vast lake bubbling with methane in Alaska .They are pointing to a dramatic shift beneath our feet – one driven by thawing Arctic permafrost, the vast frozen layer that stores nearly twice as much carbon as the entire atmosphere. Learn why these geological curiosities reveal a dangerous climate wildcard – one powerful enough to accelerate global warming in ways current models don’t yet predict.To watch the full film, visit https://www.pbs.org/wgbh/nova/video/arctic-sinkholes/Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/25/26 |  AI Is Coming for Blue Collar Jobs | Hany Farid | AI isn’t just coming for office jobs—it’s coming for some hands-on blue collar professions, too. AI expert Hany Farid explains which jobs are safe, and which are at risk. For more, check out the extended interview with Hany Farid. Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/18/26 |  What Species Can We De-Extinct? | Beth Shapiro | Scientists claimed in 2024 that they "de-extincted" the dire wolf… so what’s next, and what determines whether a species can be brought back? Evolutionary biologist Beth Shapiro explains some of the factors that go into deciding what to try and bring back. For more, check out the extended interview with Beth Shapiro. Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
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| 3/17/26 |  Einstein’s Quantum Riddle | Quantum particles are breaking the rules of reality – or so it seems. Can they truly communicate across time and space instantly? Einstein dismissed this “spooky action at a distance,” convinced it exposed flaws in quantum theory. But the deeper scientists looked, the stranger the universe became. From fierce debates to important discoveries, discover how a once‑controversial quantum oddity is now reshaping how we think, how we compute, and how the future gets built.To watch the full film, visit https://www.pbs.org/wgbh/nova/video/einsteins-quantum-riddle/ Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/11/26 |  Were Dinosaurs Able to Sing? | Erich Jarvis | Dinosaurs might not have been the roaring beasts many imagine. Neuroscientist Erich Jarvis explains why modern birds—living dinosaurs—offer clues about vocal learning and why dinosaurs could have been singers.For more, check out the extended interview with Erich Jarvis. Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/4/26 |  Space-Time Expansion, Explained | Adam Riess | If the universe is expanding, why aren’t galaxies stretching apart? Cosmologist Adam Riess breaks down the physics behind cosmic expansion, the forces that resist it, and why dark energy dominates the vast spaces between.For more, check out the extended interview with Adam Riess.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 3/3/26 |  Black Hole Apocalypse | What if black holes are hiding the answers cosmologists have been chasing for a century? Born from the explosive deaths of massive stars, black holes are so dense even light cannot escape – making them challenging to observe. But after decades of chasing the unseeable and building ever more sophisticated observation tools, researchers are now discovering that they hold profound clues about the nature of spacetime, the formation of galaxies, and the energy that powers our universe.To watch the full film, visit https://www.pbs.org/wgbh/nova/video/black-hole-apocalypse/ Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/25/26 |  Your Brain’s Peak Performance Mode | Heather Berlin | Why does thinking too hard ruin your rhythm? Neuroscientist Heather Berlin unpacks the science of flow states, explaining why mastery means trusting your brain’s hidden systems to do what they do best.For more, check out the extended interview with Heather Berlin.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/18/26 |  Black Hole Geometry Will Warp Your Brain | Janna Levin | Black holes can be bigger on the inside than they are on the outside. Astrophysicist Janna Levin explains how this is possible, and what that means about how black holes work. For more, check out the extended interview with Janna Levin.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/17/26 |  Your Brain: Perception and Control | Are we really in control of our own minds? Research suggests our sense of control may be far more fragile – and far stranger – than we imagine. From moments when the body seems to act without us, to the eerie ways our brains can warp what we think we’ve heard, scientists are uncovering a picture of the mind that’s anything but straightforward. And beneath it all lies a surprising discovery: the brain is less an observer of reality than a prediction engine, forever guessing what comes next.To watch the full film, visit https://www.pbs.org/wgbh/nova/series/your-brain/ Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/11/26 |  What Exactly Is a Law of Nature? | Robert Hazen & Michael Wong | What’s the difference between a fact, a law, and a theory? Mineralogist Robert Hazen and astrobiologist Michael Wong unpack the hierarchy of scientific ideas and reveal how laws of nature elegantly unify the universe.For more, check out the extended interview with Robert Hazen and Michael Wong.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/4/26 |  How Many Microbes Live on Earth? | Peter Girguis | Sorry, Beyoncé, it turns out microbes rule the world. Microbiologist Peter Girguis explains how to conceptualize just how many microbes are on Earth… and how understanding this helps us look for life on other worlds. For more, check out the extended interview with Peter Girguis.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 2/3/26 |  Hunt for the Oldest DNA | Scientists have discovered the oldest DNA ever found: tiny fragments hidden in the dirt. The idea that soil could hold genetic traces from creatures that vanished millions of years ago seemed impossible – until one researcher had the wild idea to go and look. But how did he find DNA that most scientists thought could never survive? What forgotten worlds can this buried DNA reconstruct? And what might these revelations tell us about our own future on a rapidly changing planet?To watch the full film, visit here.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 1/28/26 |  Why Tropical Trees Don’t Have Rings | Kirk Johnson | Growth rings on trees can measure time, allowing scientists to date things from the deep past. But, paleobotantist Dr. Kirk Johnson explains why, in the tropics, some trees have no rings.For more, check out the extended interview with Kirk Johnson.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 1/21/26 |  How Weight Loss Drugs Were Inspired by Gila Monsters | Sean B. Carroll | Nature has been solving problems for billions of years. Evolutionary biologist Sean B. Carroll reveals why scientists still turn to evolution’s inventions for life-saving breakthroughs, from GLP-1 drugs to statins.For more, check out the extended interview with Sean B. Carroll.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 1/20/26 |  Introducing NOVA Remix | Science's most astonishing breakthroughs, from whale evolution and thawing permafrost to black holes and quantum entanglement, to the hidden chambers of the Great Pyramid. NOVA Remix transforms decades of award-winning storytelling into immersive audio adventures. Discoveries that don't just change science, they change how you see the world. Whether you're a diehard nerd or just curious by nature, subscribe and hear it like never before.Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 1/14/26 |  De-Extincted” Dire Wolf Pups Are Growing Up | Beth Shapiro | In 2024, scientists claimed they achieved the unthinkable: the birth of dire wolf pups, reviving a species that vanished thousands of years ago. Now, those pups are growing—and changing. Evolutionary biologist Beth Shapiro reveals what it’s like to watch these predators mature into modern beasts.For more, check out the extended interview with Beth Shapiro. Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
| 1/7/26 |  How AI Is Taking “Future-Proof” Jobs | Hany Farid | Is AI coming for your job? AI Expert Hany Farid breaks down how AI is taking jobs once considered “future-proof” and shares his advice to prepare young people for the future.For more, check out the extended interview with Hany Farid. Learn more about NOVA and subscribe to our YouTube channel. | — | ||||||
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