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The Search for Aliens with SETI Co-Founder, Jill Tarter

2025-08-26 Science & Technology
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StarTalk
StarTalk
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The Stakes and Scope of Searching for Extraterrestrial Intelligence

Discover why radio waves remain the primary tool for SETI, what AI means for future detection, and how success in this search hints at humanity's long-term survival.

Short Summary

  • The search volume analyzed is minuscule compared to the cosmos, resembling dipping one glass into the entire ocean for fish.
  • Radio waves are favored because longer wavelengths penetrate cosmic dust better than optical or infrared light.
  • Success in finding established civilizations implies that overcoming technological infancy and avoiding self-destruction is possible.
  • The conversation explores detection bias (looking for technology) and the profound ethical questions surrounding first contact.

This discussion with SETI founder Jill Tarter anchors speculative fears about alien life by detailing the rigorous, technology-based search methods currently deployed. Understanding the limitations and profound potential rewards clarifies humanity’s place in the galactic context.

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Description

Are we alone in the universe? Neil deGrasse Tyson and comic co-host Matt Kirshen sit down with one of the founders of the SETI Institute, Jill Tarter, to explore the search for intelligent life beyond Earth, technosignatures, The Drake Equation, and more. Jill shares how programming early computers led her to a career scanning the cosmos, and why brown dwarfs once seemed like the answer to the galaxy’s “missing mass.” She addresses public suspicions of government coverups, explains what SETI actually listens for, and reveals why radio waves remain the best bet for detecting interstellar communication. From AI-assisted data analysis to infrared and optical searches, we learn about the evolving toolkit for detecting technosignatures. What exactly are we “listening” for? Listener questions prompt discussions on the detectability of Earth, the ethics of first contact, and how religion might shape humanity’s response. We learn how little of the cosmic “ocean” we’ve actually sampled, why longevity in the Drake Equation matters, and whether faster-than-light communication is possible. Along the way, Jill reflects on the thrill and the stakes of answering one of humanity’s most profound questions. Thanks to our Patrons Bryan Boleyn, Lisa, TheTrustyTrading Post, Kasharn George, Jon Warninger, Gatorcat, Ann, Drisco Leyva, Jorge Estelles, Wayne Holt, tati, Only Zuul, Doug Macuit, Larry Spencer, SANDMAN1974, Jason Lingle, Rob Christian, Pete Hall, Rick Henderson, Dave, Adam Hershman, Eric Clement, Dalmir da Silva, Derek Graham, dynsul, Mateusz Ratajczak, Gary Jaklevich, Bryant, buddyp, Micheal Genn, Stephen Macknik, Rodrigo Torres, Kat Genrich, Martin Le Blanc, Matthew Jury, Frank Gallagher, Jo S, Erik Ritter, Hamish Dunn, Jesse, Terry Remsik, Lynn Newton, Hunter Greeson, Eva, Adam Krebsbach, Scott Alderman, Poppy Docherty, Diamond Bro, and Nicholas Volpi for supporting us this week. Timestamps: 00:00 - Introduction: Jill Tartar 6:56 - Has the Discovery of Alien Life Been Suppressed? 11:39 - Why Radiowaves? 20:19 - Once We Find Life, What Do We Do? 21:14 - A Terrifying Thought 23:02 - What Are We Listening For? 27:46 - Alien SETI Detecting Us 29:33 - What Telescopes Do We Use? 32:02 - How Detectable Are We? 35:25 - Ethical Standards 41:25 - Faster-Than-Light Communication 43:59 - Will We Coincide with Other Life? 48:00 - Thoughts on UAPs Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson

Top Comments (10)

@StarChasersHere 2025-08-26

The reason that aliens have never visited us is because our solar system has received terrible reviews. We only have one star. ⭐

1.5k 98 replies
@annwalk9250 2025-08-26

My late husband and I had a dedicated PC that ran 24/7 for SETI to process data.

333 39 replies
@TheOrionSeal 2025-08-26

Frank Drake’s book “Is anyone out there” is well worth a read.

255 10 replies
@StarTalk 2025-08-26

If we one day discover intelligent life beyond Earth, what do you think will matter more—how we respond, or how they perceive us?

165 138 replies
@Educated2Extinction 2025-08-27

I loved the "dipping a glass in the ocean" analogy. Too often we forget how small we are.

128 24 replies
@acie502 2025-08-26

I could listen to Jill talk for hours. Very insightful and passionate.

113 1 replies
@SlowlyMakingItHappen 2025-08-27

This is such a good episode. I absolutely enjoy elders who share knowledge. A guy can tell well a person is a deep thinker, when they speak slowly, and some times many mmms, as they think through what they are saying. Its a sign of a sharp mind. Because sensationalism is so prevalent nowadays that people who speak slowly are such a treat to learn from. Bravo. The example that is shocking, is Neil and Matt are shifting their eyes up and left and right as she talks, which indicates that they are also deeply thinking about the conversation. And its a very special treat that Jill is able to bring out these qualities in these gentlemen that allows them to form a thoughtful rebuttal.

62
@barbaraolsen5674 2025-09-24

Jill, I'm 70 and Contact is my favorite movie. My one wish is to see life discovered beyond Earth. May we live to see the day❤

26 4 replies
@srishtysharma 2025-09-01

Can't believe this was just five days ago! Such inspirational personalities.

14
@Geoff-fr9wt 2025-09-02

Jill, I love the way you give thought to the words you select to make a point. So clear and also gives us time to follow and understand your thought process. Thank you.

12

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