The Edge

The Edge

A podcast for surviving our modern world. With help from UC Berkeley experts, California magazine editors Laura Smith and Leah Worthington explore cutting-edge, often controversial ideas in science, technology, and society. Should you be able to choose your baby’s IQ? Are algorithms really smarter than people? As we face a planet devastated by climate change, what is the future of food? All that and more. A production of California magazine and the Cal Alumni Association. // Reported and hosted by Laura Smith and Leah Worthington; produced by Coby McDonald; artwork by Michiko Toki; original music by Mogli Maureal

Episodes

August 14, 2025 61 mins

Some Catholics no doubt took offense, but no one was seriously harmed by the Pope-in-a-puffer-jacket meme. Far more sinister deepfakes are on the rise, however, with scammers now frequently using widely available technology to bilk the unwary, and political campaigns marshaling AI to sow lies about their opponents. Perhaps the greatest threat is not the deepfakes themselves but that their mere existence can cause us to question the...

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Just over a decade ago, Berkeley computer science professor Stuart Russell, recently named one of TIME’s 100 Most Influential People in AI, warned a lecture audience that achieving artificial general intelligence “would be the biggest event in human history . . . and perhaps the last event in human history.” Since then, the development of superintelligent AI has only accelerated—infiltrating nearly every part of society. So, what d...

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May 13, 2025 40 mins

There’s a paradox in robotics that says: what’s easy for humans is hard for robots, and vice versa. Complex calculations, for instance, are the domain of machines. Simple motor tasks like picking up an object, on the other hand, can stump a robot. That’s where our guest comes in. Jeff Mahler has spent his career working on improving the capabilities of robotic object manipulation. After completing his postdoctoral work at UC Berkel...

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Can we look into the past? Does the universe have an edge? What’s so great about a total solar eclipse? Have we been visited by aliens? Astrophysicist Alex Filippenko joins Editor-in-Chief Pat Joseph live onstage to discuss eclipse chasing, dark energy, and the abiding mysteries of the universe. 

Further reading: 

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September 10, 2024 42 mins

Octopuses and humans have very little in common. It’s not just a matter of their eight limbs and cool camouflage—we haven’t had a shared ancestor for more than half a billion years, before dinosaurs walked the earth. But there’s one surprising thing we do seem to share: MDMA makes us both a lot cuddlier. For neuroscientist Gül Dölen, this was a huge insight into the powerful role psychoactive drugs can play in animal social behavio...

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March 5, 2024 38 mins

Don’t let the term “climate change” mislead you. It’s true that our environment is changing in all sorts of ways as we continue to pollute and exploit and manipulate our planet. But even as we brace for more historic typhoons and biblical floods, there's an invisible and pervasive force that is wreaking havoc on us all: heat. In this episode, we speak with environmental journalist and Berkeley alumnus Jeff Goodell about his la...

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November 1, 2023 33 mins

Nearly four years have passed since COVID swept the globe, infecting millions and bringing society to a grinding halt. The ensuing months saw strict mask mandates, revolutionary vaccines, new viral strains, and—finally—a return to some sort of normal. With the end of the public health emergency and a sudden disappearance of the once-ubiquitous masks, it’s easy to feel like the pandemic is, well, over. But some would strongly disagr...

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Roughly every second, a star explodes. Beyond treating astronomers to a radiant light display, these dramatic supernova events contain vast amounts of information about the origin, behavior, and ultimate demise of our universe. UC Berkeley astrophysicist Sarafina El-Badry Nance, has dedicated her life to studying really big exploding stars and what they tell us about our ever-expanding universe. She joins us this episode to talk ab...

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We’re back with something a little different this month. In the wake of this year’s historic floods, wildfires, and hurricanes, we asked ourselves: What would it look like to take a more optimistic attitude towards slowing climate change? In that spirit, we’re sharing an episode of The Science of Happiness, a podcast co-produced by UC Berkeley's Greater Good Science Center and PRX. The first in a miniseries the center is airin...

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January 5, 2023 31 mins

For centuries, doctors have medically treated people differently according to their race because they believed that race was biological. But in recent years, medical professionals and activists have argued that this is both wrongheaded and can be dangerous to people’s health. In this episode, we talk to UC Berkeley grad Stephen Richmond, a primary care physician and assistant professor at Stanford, about the movement to abolish bio...

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October 11, 2022 18 mins

Car-free streets are no longer just an urban fantasy. In cities across the nation, a movement is growing to return the streets to the people. In this episode, we talk to two advocates from UC Berkeley about their quest to ‘pedestrianize’ Telegraph Avenue and their grand vision for a more walkable, bikeable future.

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July 25, 2022 21 mins

The teens are not alright! In fact, they’re experiencing a sleep crisis. In this episode, we talk to journalist and UC Berkeley grad Lisa Lewis about why teens have different sleep needs than the rest of us and how she worked to get more sleep for all Californian teens. We explore sleep hygiene and what it means to restructure society around a vital health need. 

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June 22, 2022 27 mins

Today, we’re featuring the audio version of California magazine’s recent cover story, “Into the Ishi Wilderness.” In 1911, a Yahi Native American man walked out of the wilderness near Oroville, California. The famed anthropologist Alfred Kroeber brought him to UC Berkeley’s campus. What happened next is still being hotly debated almost 100 years later. 

For audio text, please see the feature article, Into the Ishi Wilderness. 

This e...

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May 31, 2022 28 mins

These days, kids want to be social media influencers when they grow up. But is it a viable career? And what does our ever-growing social media obsession mean for society? In this episode, we talk to TikTok star and UC Berkeley grad Talia Lichtstein about her day-to-day routine, how she makes money, and the future of work in the era of social media. 

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March 31, 2022 34 mins

How is it possible to be blind and able to see at the same time? In this episode, we explore a bizarre, paradoxical neurological condition called blindsight, which challenges everything we think we know about vision—and offers insight into the nature of human consciousness. Leah is joined by a UC Berkeley researcher and Simon Lewis (JD ‘80), a film producer and survivor of a traumatic brain injury, to discuss how blindsight works a...

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February 16, 2022 36 mins

It’s not easy coming up with the perfect opening line on Tinder. Should you play it cute? Ask a thought-provoking question? Woo them with a witty remark? One entrepreneur thinks he has the answer: robot-generated text. Artificial intelligence is already helping us compose emails and complete sentences, so why stop there? Laura and Leah talk to UC Berkeley grad and the founder of Keys about the possibilities—and dangers—of letting r...

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October 7, 2021 22 mins

You hear about blockchain everywhere: social media, the news, the guy next door. Some say that in a few years, everyone will use it for everything, much like the internet. But right now we’re in the early days, and it’s pretty Wild West. (Think: early ’90s internet.) Laura and Leah talk to Medha Kothari, a UC Berkeley alum and founder of she256, a non-profit promoting diversity in blockchain, about what blockchain is and why it has...

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Passenger pigeons. Woolly mammoths. Neanderthals. They’re all extinct. But what if we could bring them back? And if we could, should we? Geneticists are exploring de-extincting extinct and near-extinct species, but ethical and logistical problems abound. Laura and Leah sit down with a genetic engineer and an ecologist from UC Berkeley to understand how de-extinction works and the unintended consequences of playing god. Life, uh, fi...

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May 19, 2021 33 mins

Since the first human left Earth’s atmosphere in 1961, few earthlings—and even fewer private citizens—have had the opportunity to “boldly go” there. But, with new advancements from SpaceX, Blue Origin, and other spaceflight companies, wealthy tourists could soon be booking rooms in hotels in outer space. As with any new industry, the rise of space tourism raises some new, sometimes uncomfortable, questions: Are we colonizing space?...

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April 7, 2021 46 mins

Five years after 29-year-old, terminally ill Brittany Maynard makes national news by choosing to end her life early, medically assisted death continues to face enormous legal and social barriers. And yet public support of the practice is high. As life-expectancy and palliative care improve, we face new questions: Under what circumstances are people allowed to choose when and how they die? And how might rethinking the conversation a...

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