Episodes
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For over a century, we’ve been in the midst of a revolution in longevity – one that is unprecedented in human history. More than a quarter century has been added to the average lifespan since the 1900s. How should individuals and society make the most of this time? How can we rethink education, careers, healthcare, and retirement in light of our longer lives? In the season finale of The World As You’ll Know It: The Future of Aging, we speak with psychologist Laura Carstensen and economist Andrew J. Scott about what it will take to maximize those extra 30 years we’ve gained – not just in old age, but throughout our lifetimes.
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The world today is oversaturated with trends, tips, and treatments for how to live long and be healthy while doing it. But it can be hard to know who to listen to – and what actually works. In this episode, we talk to Dr. Eric Topol, renowned cardiologist and author of the book Super Agers: An Evidenced-Based Approach to Longevity, to clear up some of the myths around healthy aging and shine light on what actually works. We cover everything from how much sleep you need and how much movement to get, to dietary advice and the benefits of social engagement — and much more.
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Missing episodes?
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Women tend to live longer than men, even under the most difficult conditions like famines and epidemics. While it’s true that women tend to go to the doctor more and engage in less risk-prone activities, behavior alone doesn’t explain this phenomenon. In this episode, demographer Virginia Zarulli tells us about the implications of the startling fact that, in times of extreme hardship, it is often infant girls outliving infant boys that contributes most to the gap in longevity. Neurologist Dena Dubal, who has spent years studying the influence of the second X chromosome that females carry, explains how research into how women age will benefit men, too. And neuroscientist Lisa Mosconi talks about the impact of sex hormones on aging and why women are disproportionately susceptible to certain age-related diseases.
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We’ve known about Alzheimer’s and its devastating effects for more than 100 years, and have been predicting an imminent cure for at least the last 25. So why is it that after so many years of research and unrelenting loss, we’re not further along in our progress towards a cure? In this episode we consult three experts who have dedicated much of their lives to understanding this question. Neurobiologist Karl Herrup is the author of “How Not To Study a Disease: The Story of Alzheimer’s.” Charles Piller is a journalist who spent years researching the scandals that recently rocked the Alzheimer’s community. Donna Wilcock is a neurologist who has been studying Alzheimer’s disease and other forms of dementia for decades, and is also the editor-in-chief of the official journal of the Alzheimer’s Association. Together they help explain where we went wrong, and suggest where we might look next in our search for a cure.
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A forgotten name, misplaced keys, feeling overwhelmed by some new technology. Classic signs of a brain beginning its long, inexorable descent into old age? Not necessarily. In fact, new research shows that we can preserve and even enhance our cognitive skills as we get older. In this episode, we explore the science behind the aging brain with psychologist and lifelong learner Dr. Rachel Wu, who has made remarkable breakthroughs in understanding how older brains acquire new skills and knowledge. We also speak to Dr. Cindy Lustig, a neuroscientist, about the chemical changes that take place in our brains as we get older, and how they affect the ways we think and behave. Finally, we look at wisdom. Older people are wiser than younger ones (at least in the United States). We speak to social psychologist Dr. Richard Nisbett whose studies show that the idea of getting older and wiser is no myth.
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Blood transfusions, cryotherapy, experimental drugs and intermittent fasting are just a few of the measures so-called biohackers are taking in hopes of radically extending their lifespans. But what started as a faddish subculture has boomed into a multi-billion dollar industry – encompassing both shady claims and reputable scientific research. In this episode, we unpack the science and the hype behind some of the most prominent biohacking tools being used today, including caloric restriction, Rapamycin, and Metformin with Dr. Venki Ramakrishnan, the Nobel Prize-winning biochemist. We also speak with Dr. Daniel Belsky, the inventor of a blood test that can reveal how fast your body is aging, which could expedite testing on potentially life-extending treatment.
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In 2000, two scientists — Steve Austed, a biologist and Jay Olshanksy, a biostatistician — made a bet. Would a person live to the age of 150 by the year 2150? Austad bet yes and Olshansky bet no. The wager? $150, which will grow to more than one billion by the time it’s settled. In this episode, we revisit this twenty-five year old bet to find both men sticking to their guns. We also speak to Nobel Prize winner, Venki Ramakrishnan, about new insights into what causes us to age. The episode explores the latest science around aging to expose two competing ways of understanding the human lifespan. Are we locked into a hard age limit established by centuries of data? Or could a scientific breakthrough push us far beyond it so that many of us will live decades longer?
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Human beings are living longer than ever. Thanks to advances like vaccines, antibiotics, pasteurized milk and clean water, we’ve added more than 30 years to the average lifespan over the last 120 years. That’s more than was added in the previous 10,000 years combined. More recently, enormous progress has been made in our treatment of deadly conditions like heart disease and cancer, with mortality rates for each dropping by double digits. Now science is tackling a new challenge: Can we cure aging itself? In pursuit of this holy grail, longevity research has gone from a sleepy backwater to a multi billion dollar field, populated — yes — by plenty of hucksters, but also by Nobel laureates. The goal is to find out what causes us to age and what we can do to slow it down, or maybe even reverse it altogether. Could tweaking the right molecule buy us 20 more years, or are we maxed out? Can older brains be re-wired to function like younger brains? Do any so-called biohacks actually work?
These are some of the questions we are tackling in this season of The World as You’ll Know It: The Future of Aging. With leading scientists in the fields of biology, neuroscience and medicine, we’ll look at the cutting-edge of aging research and what living longer could mean for all of us.
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The Paris Climate Agreement says we need to reach “net zero” carbon emissions by 2050. That means for every new carbon molecule we put in the air, we have to take one out. Even the most optimistic forecasts still anticipate burning fossil fuels well past that date. So how do we balance the carbon books? Enter direct air capture, or DAC — a mechanical process that sucks carbon out of the atmosphere — which many believe will be crucial to controlling climate change. Right now the technology is extremely expensive, energy intensive, and has never been deployed at the scale necessary to make a difference. Host Arielle Duhaime-Ross speaks with the Dr. Klaus Lackner, known as the “godfather of carbon removal”; Dr. Susan Hovorka, a professor of geology who has been burying carbon underground for decades; and Dr. Emily Grubert, associate professor of sustainable energy policy at Notre Dame.
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Hydrogen has long been the great hope of the environmental movement. Hydrogen-powered cars; airplanes; even home heating. A single molecule could power it all. Much of that has gone nowhere. But now, hydrogen is being touted as the answer to carbon-free steel. Can we trust in our hydrogen future this time? To explore that question, host Arielle Duhaime-Ross talks to Rachael Fahkry, policy director at the Natural Resources Defense Council, and Jason Mortimer, from the company Electric Hydrogen.
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Heat kills more people in the United States than any other weather event, and scientists expect the earth to continue to get hotter. Unfortunately, one of the most effective tools we have to combat heat — air-conditioning — also contributes to global warming. The hotter we get, the more AC we’ll need: It’s a conundrum. So how do we keep cool without making the planet hotter at the same time? Host Arielle Duhaime-Ross speaks to Dr. David Hondula, the Director of Heat Response and Mitigation for the city of Phoenix, Arizona; Rachel Kyte, a former U.N. Special Representative, and professor in climate policy and sustainability; and Dr. Daniel Betts, an engineer and founder of the air-conditioning company Blue Frontier.
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The United States was once on track to be a world leader in nuclear power, building more than 100 plants in the 1970s and 1980s. But cost and safety concerns led to decades of decommissioning old plants and canceling plans to build new ones. Now, with clean energy production a top priority, there are signs of a revival. Reactors at the first new nuclear plant to be built in almost 30 years went online last year, and the Biden administration wants to triple the country’s nuclear capacity. Host Arielle Duhaime-Ross discusses the hurdles facing nuclear power, as well as a new vision for smaller, more adaptable reactors with Dr. Kathryn Huff, former assistant secretary for the Office of Nuclear Energy; historian and Pulitzer-Prize winning author Richard Rhodes; and the undergraduates – that’s right, undergraduates – who run their own nuclear reactor.
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Americans drive more, drive further, and pay less for fuel than people in other developed countries. Partly for this reason, our vehicles are more than just a means of transportation — they’re extensions of who we are. So persuading Americans to swap out gas-dependent cars for EVs is a different — and in many ways more difficult — challenge. What’s it going to take to get more Americans into electric vehicles? Host Arielle Duhaime-Ross explores the obstacles and possible solutions to EV adoption with guests David Ferris, a reporter covering transportation and energy for E&E News and Politico; Joseph Barletta, the founder and CEO of Smart Charge America, a company that installs EV chargers; and Dr. Linda Nazar, an expert in battery chemistry and professor of chemistry at the University of Waterloo. To learn more about listener data and our privacy practices visit: https://www.audacyinc.com/privacy-policy Learn more about your ad choices. Visit https://podcastchoices.com/adchoices
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In the past 50 years, solar energy has surpassed all expectations. Even early solar experts couldn’t predict how affordable and widespread it would become. The story behind its success involves Einstein, US presidents, obscure legislation and a global relay race. Now the question is – What can the rise of solar power teach us about the future of other climate technologies? Join this season’s host, Arielle Duhaime-Ross, in conversations with Greg Nemet, author of “How Solar Became Cheap,” and Nathanael Greene, from the National Resources Defense Council, to discuss today’s solar landscape, its future potential, and the challenges we face in getting there.
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We’re currently involved in one of the most ambitious projects we, as humans, have ever attempted: Rebuilding the world, pretty much from the ground up, in order to switch from fossil fuels to clean energy sources. In this season of The World as You'll Know It, science journalist Arielle Duhaime-Ross goes deep inside the world of cutting-edge climate technologies and asks: How is this going to work? The answers — from some of the world’s most innovative and audacious thinkers, builders and investors — reveal the promise, obstacles and tradeoffs of a new clean-energy landscape that will shape the way we live.
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In our final episode, Host Gary Marcus shares his hopes for and fears about an AI-driven future. On the one hand, AI could accelerate solutions to some of society’s most difficult problems; on the other, it could deepen existing problems and create new existential risks to humanity. Getting it right, Marcus emphasizes, depends on establishing both national and international standards for the industry as soon as possible. He is joined by Dr. Alondra Nelson, who led the White House Office of Science and Technology Policy in 2021, and Brian Christian an AI researcher and the author of The Alignment Problem; Machine Learning and Human Values.
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Some people use chatbots for therapy. Others have fallen in love with them. And some people argue that AI systems have become sentient and are entitled to certain rights. In this episode, Gary Marcus explores our relationship with AI technology — how it’s changing and where it might lead. He speaks with Blake Lemoine, an engineer who believes that a Google program has achieved sentience and even has feelings, Eugenia Kuyda, the founder and CEO of Replika, Anna Oakes, a lead producer and co-host of Bot Love, and Paul Bloom, a cognitive psychologist who believes we are on the forefront of a new age of human-machine interaction.
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The emergence of generative AI threatens to automate millions of jobs, potentially ushering in a new and unprecedented wave of job displacement. In the past, newly created jobs replaced those lost. Will that happen this time? To discuss this, Gary Marcus is joined by Amy Winter, a concept artist who sees generative AI as a threat to her career, Brian Merchant, the technology columnist for the Los Angeles Times and author of “Blood in the Machine: the Origins of the Rebellion against Big Tech”, and Dr. Erik Brynjolffson, an economist and Senior Fellow at the Stanford Institute for Human-Centered AI, that studies the effects of technology on the workforce.
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Misinformation has already influenced our elections, ruined reputations and fundamentally changed society’s relationship with the truth. Now, large language models like GPT have the potential to create and spread misinformation at a speed and scale we’ve never seen before. As new technologies allow bad actors to imitate the way we write, the way we speak and the way we appear in photos and videos, the question won’t be, ‘What we can believe in?’ but whether we’ll be able to believe in anything at all. To discuss how we got here and what we must do to fix it, host Gary Marcus talks to Pranshu Verma and Will Oremus, two technology writers from the Washington Post, and Dr. Rumman Chowdhury, a leading expert in Ethical AI and former Director of the Ethics and Transparency team at Twitter.
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New large language models are capable of writing essays, drafting marketing pitches and having human-like exchanges on chat apps. But can they make us laugh the way a human can? To explore this, host Gary Marcus is joined by Dr. Naomi Saphra, an AI researcher and comedian, Bob Mankoff, former Cartoon Editor of The New Yorker magazine and Yejin Choi, a computer science professor at the University of Washington and 2022 MacArthur Fellow. While artificial intelligence systems can generate far more jokes than humans can, knowing what’s funny remains — at least for now — a uniquely human ability.
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