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PODCAST

SETI Live

SETI Live is a weekly production of the SETI Institute and is recorded live on stream with viewers on YouTube, Facebook, LinkedIn, X (formerly known as Twitter), and Twitch. Guests include astronomers, planetary scientists, cosmologists, and more, working on current scientific research. Founded in 1984, the SETI Institute is a non-profit, multi-disciplinary research and education organization whose mission is to lead humanity"s quest to understand the origins and prevalence of life and intelligence

science natural sciences

All Episodes

31:52

Chasing Martian Microbes: A New Technique for Finding...

SETI Live ·

2025/04/22

A road trip to a gypsum quarry in Algeria led Youcef Sellam on a journey of scientific discovery. From the road trip to an internship in Italy, he and his colleagues later discovered microbial fossils—marking a first for Algerian gypsum. As a Ph.D. student at the University of Bern, Sellam and his team took this research further. They used a special instrument to detect the chemical signatures of these ancient microbes, demonstrating a method that could one day help search for traces of life on

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33:38

Why is Mars Red? New Research Suggests Ferrihydrite...

SETI Live ·

2025/04/15

In a recent study, Dr. Janice Bishop of the SETI Institute, along with postdoctoral researcher Adomas Valantinas from Brown University, propose that Mars' characteristic red hue is primarily due to ferrihydrite—a water-rich iron oxide mineral—rather than the previously assumed hematite. Analyses of data collected by Martian orbiters, rovers, and laboratory experiments showed that ferrihydrite closely matches the composition of the dust covering Mars' surface. Ferrihydrite typically forms in

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38:15

The Climate Chronicles with Professor Dagomar Degroot

SETI Live ·

2025/04/08

In The Climate Chronicles, a podcast with 42 episodes across eight seasons, Professor Dagomar Degroot of Georgetown University "takes you on a journey through 50 million years of climate change." He delves into how climate change has shaped civilizations—from the earliest hominid ancestors to the present era of rapid global warming. Through storytelling and historical analysis, he reveals the profound influence of climate on human societies. He explains how lessons from the past can help us navigate

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26:20

Super-Earth Laboratory: Using HD 20794 d to...

SETI Live ·

2025/04/01

With over 7,000 exoplanets identified in our galaxy, scientists are shifting their focus to studying these worlds' characteristics in the quest for extraterrestrial life. The backdrop for one team is the discovery of super-Earth HD 20794 d, an exoplanet detected by researchers from the University of Geneva (UNIGE) and NCCR PlanetS. Orbiting in an eccentric path, HD 20794 d moves in and out of its star’s habitable zone, making it a compelling subject for further study. This breakthrough, built on two

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29:47

Amino Acids on Bennu! Building Blocks for Life...

SETI Live ·

2025/03/25

The OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) mission has been a resounding success, from taking a sample of asteroid Bennu to returning that sample to Earth. The first in-depth analysis of the space rocks is complete, and the results have been published in Nature and Nature Astronomy. One of the most intriguing results shows that 14 of the 20 amino acids life on Earth uses to form proteins have been found in the sample. This result

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36:23

A PUNCH for the Sun: NASA’s Polarimeter to Unify the...

SETI Live ·

2025/03/18

NASA’s Polarimeter to Unify the Corona and Heliosphere, or PUNCH mission, is a constellation of four small satellites in low Earth orbit that will make global, 3D observations of the Sun’s corona to better understand how the mass and energy there become the solar wind that fills the solar system. Imaging the Sun’s corona and the solar wind together will help scientists better understand the entire inner heliosphere—the Sun, solar wind, and Earth—as a single connected system. Solar wind and energetic

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36:55

Space is the Case: A Conversation with SETI Artist in...

SETI Live ·

2025/03/11

During his time as an Artist in Residence (AIR) at the SETI Institute, visual artist, psychiatrist, and psychoanalyst Martin Wilner invited prominent SETI Institute scientists to participate in his ongoing project, The Case Histories. Interested in exploring how scientists relate to the possibility of encountering an alien life form, Wilner invited researchers such as Jill Tarter, Seth Shostak, and Franck Marchis to send him daily messages and share thoughts of interest. These messages, filtered

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33:17

Looking for Lunar Anomalies Using Automated Methods

SETI Live ·

2025/03/04

Over the past decade, NASA's Lunar Reconnaissance Orbiter (LRO) has captured thousands of high-resolution images of the Moon's surface—far more than humans can manually review. To tackle this challenge, scientists have developed an automated system that quickly identifies scientifically significant images from the LRO data, making it the first anomaly detector for planetary imagery. Experiments show that the system reliably highlights unusual features, such as striking geological formations and

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35:19

Earth Detecting Earth: How Far Away Can We Detect...

SETI Live ·

2025/02/26

If an extraterrestrial civilization existed with technology similar to ours, would they be able to detect Earth and evidence of humanity? If so, what signals would they detect, and from how far away? Researchers used a theoretical, modeling-based method, and this study is the first to analyze multiple types of technosignatures together rather than separately. The findings revealed that radio signals, such as planetary radar emissions from the former Arecibo Observatory, are Earth’s most detectable

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29:05

Unistellar + SETI: Citizen Science Q&A (Part 5)

SETI Live ·

2025/02/18

Join Dr. Franck Marchis, Chief Science Officer and co-founder at Unistellar and director of Citizen Science at SETI Institute, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We review the 2024 citizen science accomplishments and discuss the 2025 campaigns so far. We will answer your questions about our program from the Unistellar community page and discuss some recent highlights

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34:20

Planets Form Where?? ALMA Observations Show Planet...

SETI Live ·

2025/02/12

New research using the Atacama Large Millimeter/submillimeter Array (ALMA) telescope reveals that planet formation can occur in harsh, high-radiation stellar environments. This contradicts earlier assumptions and suggests planet formation is more resilient than previously thought. The study observed protoplanetary disks within the Sigma Orionis cluster, finding structures indicating potential planet formation despite intense ultraviolet radiation from a nearby star. These findings expand our

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48:27

What to Expect in 2025 in Space Science

SETI Live ·

2025/02/04

Happy New Year! 2024 brought us a lot of exciting space news, from a total solar eclipse to the launch of Europa Clipper and our celebration of 40 years as the SETI Institute. What does 2025 hold? Join hosts Beth Johnson and Franck Marchis for our first show of the year, taking a look at new ground and space telescopes, planned missions and milestones, as well as the various eclipses. Plus, Saturn's rings will be "disappearing"! (Recorded live 9 January 2025.)

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46:18

Mixed Signals: Alien Communication Across the Iron...

SETI Live ·

2024/12/31

Join communications specialist Beth Johnson and historian Rebecca Charbonneau as they discuss Dr. Charbonneau's new book, Mixed Signals. The book examines the Cold War relationship between the US and the USSR, what it meant for radio astronomy, and how it affected the Search for Extraterrestrial Intelligence. (Recorded live on 19 December 2024.)

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33:16

Uranus Breaks (Solar) Wind: Re-Analyzing Data from...

SETI Live ·

2024/12/17

Get ready to giggle and make bad jokes. Uranus is back in the news. In 1986, Voyager 2 flew by the distant ice giant and made a strange discovery—the planet's magnetic field was weird. It's not just weird; it's unlike every other planet in the solar system. For nearly 40 years, scientists have tried to understand why. To solve the mystery, researchers delved into the data collected by Voyager 2 and found a "cosmic coincidence". The solar wind was unusually strong just prior to the flyby, causing the

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28:41

Asteroid Deflection via Nuclear Blasts and Sandia...

SETI Live ·

2024/12/10

Imagine that scene from every apocalyptic asteroid movie—you know the one. The scientist comes rushing in because a "new" asteroid has been detected and is on a collision course with Earth. What happens next? The answer depends on several factors: how big is the asteroid, what is it made of, and how soon is the impact? (That's simplified but roll with it.) NASA's DART mission showed that an impactor can change the orbit of an asteroid, but that tested the hypothesis on the tiny moon of a small

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34:42

Unistellar + SETI: Citizen Science Q&A (Part 4)

SETI Live ·

2024/12/03

Join Dr. Franck Marchis, Chief Science Officer and co-founder at Unistellar and director of Citizen Science at SETI Institute, and Dr. Lauren Sgro, Outreach Manager at the SETI Institute, for a conversation on citizen science with the Unistellar network in partnership with the SETI Institute. We take the time to answer your questions about our program on the Unistellar community page and discuss some of the recent highlights, including comet observations and exoplanet discoveries. (Recorded 21

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53:41

SETI Institute 40th Anniversary Panel: Looking Back...

SETI Live ·

2024/11/26

Nearly 40 years ago, on November 20, 1984, the SETI Institute was incorporated with inaugural officers CEO Thomas Pierson and SETI scientist Jill Tarter. The goal was to provide SETI researchers with a place to grow the search for life beyond Earth. What began with one NASA-funded SETI project and two people has since grown to include over 100 researchers and various scientific areas of study, all seeking to understand the origins and prevalence of life and intelligence in the universe. As a part of

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42:21

How to Kill an Asteroid with Dr. Robin George Andrews

SETI Live ·

2024/11/19

OSIRIS-REx and the Hayabusa spacecraft have sample asteroids to understand what they're made of. NASA sent the DART mission to change the orbit of a tiny asteroid orbiting another asteroid. ESA sent Hera as a follow-up mission to see what the impactor did. All of these missions have been done in the name of planetary defense -- protecting Earth from the worst of the rocks in space. While none of the asteroids so far discovered are a threat to our planet in the next century, there are still more out

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45:53

The Hera Mission: Following Up on the DART Impact of...

SETI Live ·

2024/11/12

In September 2022, a small spacecraft called DART hit the surface of a tiny asteroid moonlet called Dimorphos. That spacecraft was the first test of a planetary defense system, attempting to change an asteroid's orbit in the hope of being able to do so under a real near-Earth threat. The test succeeded, shortening the moonlet's orbit by 32 minutes. Now, a follow-up mission called Hera is on its way to the system, complete with an orbiter and a lander. The European Space Agency plans to observe the

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33:45

Into the Unknown with Kelsey Johnson, Ph.D.

SETI Live ·

2024/11/05

The cosmos is full of huge questions: "What caused the Big Bang? What happens inside black holes? Are there other dimensions?" Scientists have been working to answer these questions, but sometimes, we feel like the answers are unknowable. Astrophysicist Kelsey Johnson contemplates what this paradox means for science, particularly where philosophy and even religion come into play. In her latest book, "Into the Unknown", Johnson takes us to the edge of our understanding. Join communications specialist

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137 results

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