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

Episoder(348)

Plain English BEST OF: The Antisocial Century

Plain English BEST OF: The Antisocial Century

Throughout December and January, we’re going to be re-airing some of our favorite episodes of the past year and beyond. This list includes interviews that really stuck with me and some others that you...

9 Des 20251h 8min

Plain English BEST OF: How to Be Happy and the Science of Cognitive Time Travel

Plain English BEST OF: How to Be Happy and the Science of Cognitive Time Travel

Throughout December and January, we’re going to be re-airing some of our favorite episodes of the past year and beyond. This list includes interviews that really stuck with me and some others that you...

2 Des 20251h 5min

A Grand Unified Theory of Cultural Stagnation

A Grand Unified Theory of Cultural Stagnation

One of my favorite theories about the modern world is the idea that culture is "stuck." Whether the decline of ornamentation in modern architecture, or the fact that every corporate logo looks the sam...

25 Nov 202558min

The American Math Crisis

The American Math Crisis

The University of California San Diego is one of the best public colleges in America. So it was fairly shocking when the school released a report on the steep decline in academic preparedness of its f...

21 Nov 202554min

How Superintelligent AI Could Upend Work and Politics

How Superintelligent AI Could Upend Work and Politics

Many AI experts believe that some time in the next few years, we will build something close to artificial general intelligence (AGI), a system that can do nearly all valuable cognitive work as well as...

18 Nov 202558min

Everything Is Television

Everything Is Television

Sometimes, the perfect guest to discuss your own writing is ... you. On this special crossover episode, I am interviewed by Ben Smith and Max Tani of Semafor's Mixed Signals podcast about my recent es...

14 Nov 202557min

Are Young People Screwed?

Are Young People Screwed?

Youth unemployment is rising. Hiring is freezing up. The housing market is a mess. How did things get so bad for young people in the economy? And are things as bad as they seem? Michael Batnick and Be...

12 Nov 202552min

The Democrats Have a New Winning Formula

The Democrats Have a New Winning Formula

This week was a straight flush for Democrats. Zohran Mamdani completed his heroic arc to become mayor of the world’s most important city. Democrats ran up huge margins in the big governor races in Vir...

7 Nov 20251h

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