An Astrophysicist Explains the "Strongest Evidence Yet" of Alien Life

An Astrophysicist Explains the "Strongest Evidence Yet" of Alien Life

Last week, a team of astrophysicists from the University of Cambridge announced that they had discovered the “strongest indication” ever of extraterrestrial life. The source did not come from Mars or Venus or any nearby moon. It came from K2-18b, a massive planet some 120 light-years from Earth. If this finding checks out, it is, without question, one of the most important discoveries in the history of science. But many scientists think that ... well, it might not check out at all. Today’s guest is Sara Seager, a celebrated astrophysicist at MIT. Seager is a pioneer in the study of exoplanets and their atmospheres. She has done as much as practically anybody to develop the science of interpreting light from faraway stars to make inferences about planets. In today’s show, Seager and I slowly worked our way up to last week’s announcement by building a foundation of the basic science at play. What are exoplanets? How do we know that they’re there? How do we have any idea about the chemicals present on that planet if we can’t send probes to test their air? What does the K2-18b finding really tell us? And what larger philosophical questions about life and aliens are raised by this new science of exoplanet atmospheres? If you have questions, observations, or ideas for future episodes, email us at PlainEnglish@Spotify.com. Host: Derek Thompson Guest: Sara Seager Producer: Devon Baroldi Learn more about your ad choices. Visit podcastchoices.com/adchoices

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Why Money Doesn't Buy Happiness in America

Why Money Doesn't Buy Happiness in America

America is rich—richer than ever. Yet Americans are more anxious, lonelier, and less satisfied than people in many poorer nations. The 2025 World Happiness Report ranked the U.S. 24th in life satisfac...

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Is AI Really About to Solve Human Disease?

Is AI Really About to Solve Human Disease?

I’ve had the privilege of talking to many brilliant people about artificial intelligence. And when you ask them to imagine the most beneficial consequences of this technology, they almost always give ...

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In the past few weeks, we’ve done several episodes on obesity, GLP-1 drugs, and nutrition science. What we haven’t talked about as much is the politics of food. And today’s guests say: If you really ...

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This Is How the AI Bubble Could Burst

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This year, American tech companies will spend $300 billion to $400 billion on artificial intelligence, which is in nominal dollars more than any group of companies have ever spent to do anything. Nota...

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The Jimmy Kimmel Saga and America's Free-Speech Crisis

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Matt Belloni, the host of the Town podcast and the author of Puck’s 'What I’m Hearing' newsletter, joins the show to talk about Jimmy Kimmel's punishment, what happened behind the scenes at ABC and Di...

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If GLP-1 Drugs Are Good for Everything, Should We All Be on Them?

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To read more of Derek's reporting on GLP-1 drugs, you can subscribe to his Substack here. GLP-1 drugs like Ozempic and Zepbound don't just help with Type 2 diabetes and weight loss. They seem to curb...

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Charlie Kirk's Killing and America's Age of "Salad-Bar Extremism"

Charlie Kirk's Killing and America's Age of "Salad-Bar Extremism"

In the past few years, we have witnessed a frightening spiral of political violence. We’ve seen the killing of Charlie Kirk; the killing of Brian Thompson, the health insurance executive; the assassin...

12 Sep 202552min

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