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Episode 283

Earth 2.0: What Would Our Economy Look Like?

…we start with — what else? — economics. You’ll hear from Nobel laureate Angus Deaton, the poverty-fighting superhero Jeff Sachs; and many others. (Part 1 of the “Earth 2.0” series.)…


Episode 301

What Would Be the Best Universal Language?

…Esperanto! The search for a common language goes back millennia, but so much still gets lost in translation. Will technology finally solve that? (Part 4 of the “Earth 2.0” series.)…

Episode 300

Why Don’t We All Speak the Same Language?

There are 7,000 languages spoken on Earth. What are the costs — and benefits — of our modern-day Tower of Babel? (Part 3 of the “Earth 2.0” series.)…

Episode 113

Do We Have Evidence of Alien Life?

Avi Loeb is a Harvard astronomer who argues that we’ve already encountered extraterrestrial technology. His approach to the search for interstellar objects is scientific, but how plausible is his argument?

The SuperFreakonomics Global-Warming Fact Quiz

…the facts surrounding global warming. Take the following true/false quiz to test your knowledge of the science, economics, and technology of global warming. Global-warming science questions: 1. The Earth has…



Episode 81

Why Bother Searching for Aliens?

Astronomer Jill Tarter spent her career searching for extraterrestrial intelligence. She explains what civilizations from other planets could teach us about our own future….

Episode 106

Will A.I. Make Us Smarter?

Kevin Kelly believes A.I. will create more problems for humanity — and help us solve them. He talks to Steve about embracing complexity, staying enthusiastic, and taking the 10,000-year view….

Episode 284

Is Income Inequality Inevitable?

…work, the toxic remnants of colonization, and whether giving everyone a basic income would be genius — or maybe the worst idea ever. (Part 2 of the “Earth 2.0” series.)…

Episode 51

Max Tegmark on Why Treating Humanity Like a Child Will Save Us All

…an economist. He also tells Steve why we should be optimistic about the future of humanity (assuming we move Earth to a larger orbit before the sun evaporates our oceans)….


The Rare Earth Conundrum

…a mainstay, we may be trading one dependence for another that is even more troubling. Ninety-five percent of the world’s output of rare-earth metals today comes from one country: China….



Episode 346

Two (Totally Opposite) Ways to Save the Planet (Replay)

The environmentalists say we’re doomed if we don’t drastically reduce consumption. The technologists say that human ingenuity can solve just about any problem. A debate that’s been around for decades…

Episode 179

Outsiders by Design

What does it mean to pursue something that everyone else thinks is nuts? And what does it take to succeed?

After Google Earth Is Banned, What's Next?

For all the good that Google Earth has brought to the world, it’s been a boon for ne’er-do-wells and mischief-makers as well. In the U.K., teenage hooligans allegedly use it…



Episode 74

Getting Our Hands Dirty

Soil scientist Asmeret Asefaw Berhe could soon hold one of the most important jobs in science. She explains why the ground beneath our feet is one of our greatest resources…

Episode 346

Two (Totally Opposite) Ways to Save the Planet

The environmentalists say we’re doomed if we don’t drastically reduce consumption. The technologists say that human ingenuity can solve just about any problem. A debate that’s been around for decades…

Episode 368

Where Do Good Ideas Come From?

Whether you’re mapping the universe, hosting a late-night talk show, or running a meeting, there are a lot of ways to up your idea game. Plus: the truth about brainstorming….

Google Earth as Big Brother?

Google Earth isn’t just for kicks anymore: FP reports that governments around the world are using the service to catch everyone from tax evaders to marijuana growers. Amateurs are getting…



Episode 380

Notes From an Imperfect Paradise

Recorded live in Los Angeles. Guests include Mayor Eric Garcetti, the “Earthquake Lady,” the head of the Port of L.A., and a scientist with NASA’s Planetary Protection team. With co-host…

Quotes Uncovered: Heaven on Earth and Third-World

…with writing, ‘Dance like nobody’s watching; love like you’ve never been hurt. Sing like nobody’s listening; live like it’s heaven on earth.’ Later, the phrase ‘Work like you don’t need…



Episode 128

Are Our Tools Becoming Part of Us?

Google researcher Blaise Agüera y Arcas spends his work days developing artificial intelligence models and his free time conducting surveys for fun. He tells Steve how he designed an algorithm…


Episode 98

Searching for Our Aquatic Ancestors

Neil Shubin hunts for fossils in the Arctic and experiments with D.N.A. in the lab, hoping to find out how fish evolved to walk on land. He explains why unlocking…


Episode 79

Solar Geoengineering Would Be Radical. It Might Also Be Necessary.

David Keith has spent his career studying ways to reflect sunlight away from the earth. It could reduce the risks of climate change — but it won’t save us.

Episode 302

Why Learn Esperanto? (Special Feature)

…never really caught on. So why does a group of Esperantists from around the world gather once a year to celebrate their bond? (Part 5 of the “Earth 2.0” series.)…

Episode 343

An Astronaut, a Catalan, and Two Linguists Walk Into a Bar…

In this live episode of “Tell Me Something I Don’t Know,” we learn why New York has skinny skyscrapers, how to weaponize water, and what astronauts talk about in space….

When Earth Attacks Mars

NASA research suggests that there may be life on Mars after all — but that, up ’til now, we’ve been destroying it when we visit. (Does this hurt the case…



Episode 367

The Future of Meat

Global demand for beef, chicken, and pork continues to rise. So do concerns about environmental and other costs. Will reconciling these two forces be possible — or, even better, Impossible™?