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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

35:13

Lost Pulsars Found? Breakthrough Listen's Deep Survey...

SETI Live ·

2026/02/17

Are we finally uncovering hidden pulsars at the center of the Milky Way? Join host Beth Johnson and William J. Welch Postdoctoral Fellow Karen Perez for a deep dive into a newly announced discovery of a possible pulsar near our galaxy's core. Using data from the Breakthrough Listen Deep Pulsar Survey and observations with the NSF Green Bank Telescope, researchers are probing one of the most extreme and mysterious regions in the Milky Way. The Galactic Center is a chaotic environment dominated by the

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39:23

Back to the Moon: How Artemis II Sets the Stage for...

SETI Live ·

2026/02/10

Humanity is heading back to the Moon—and Artemis II is the mission that makes it real. In this SETI Live, host Simon Steel is joined by Dr. Caitlin Ahrens, assistant research scientist at NASA Goddard, to explore how Artemis II will prepare the way for future astronaut missions. Artemis II isn't landing on the Moon—but it is laying the groundwork. From mapping the lunar environment to understanding how radiation, extreme cold, and surface conditions affect both spacecraft and humans, this mission is

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31:04

Life After Ice: 46,000-Year-Old Worms Wake Up

SETI Live ·

2026/02/03

In this SETI Live episode, host Simon Steel (Deputy Director of the Carl Sagan Center) chats with evolutionary biologist Philipp Schiffer (Worm Lab) about one of the most astonishing discoveries in modern biology: scientists have revived a microscopic worm that had been frozen in Siberian permafrost for roughly 46,000 years. These nematodes entered a state of cryptobiosis — a kind of biological "pause" — and came back to life when gently thawed in the lab. They didn't just wiggle; they fed,

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47:46

SETI@home Update: 21 Years of Citizen Science—and 100...

SETI Live ·

2026/01/27

For more than two decades, millions of volunteers turned their home computers into a planet-scale telescope, donating idle processing power to the search for extraterrestrial intelligence through SETI@home. That effort ended in 2020—but the data never stopped speaking. Now, UC Berkeley scientists have taken a fresh, rigorous look at the vast SETI@home archive and identified around 100 intriguing signals that warrant closer scrutiny. In this SETI Live, host Beth Johnson is joined by Eric Korpela (UC

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30:30

When Galaxies Collide: Euclid Reveals What Triggers...

SETI Live ·

2026/01/20

Using early data from the European Space Agency's Euclid space telescope, astronomers have analyzed over one million galaxies to test a long-standing idea in astrophysics: that galaxy mergers help trigger the growth of supermassive black holes. In this SETI Live, host Dr. Moiya McTier will explore two new Euclid studies that combine vast sky surveys, machine learning, and multi-wavelength observations to uncover when and why active galactic nuclei (AGN) ignite. The results show that galaxies in the

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57:19

What to Expect in Space Science 2026

SETI Live ·

2026/01/13

2026 is a pivotal year for space science. From humans returning to the Moon to new telescopes opening more expansive windows on the universe, this year marks a turning point in how we explore space—and why it matters. SETI Institute communications specialist Beth Johnson and Senior Planetary Astronomer Franck Marchis will tour the biggest missions, milestones, and moments shaping space science in 2026. We'll look at crewed lunar exploration, robotic missions to asteroids and planets, next-generation

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37:02

3I/ATLAS: Caught in UV | What Europa Clipper Saw When...

SETI Live ·

2025/12/30

We're going live with Dr. Cynthia Phillips, Europa Clipper Project Staff Scientist and Science Communications Lead, from NASA's Jet Propulsion Laboratory, to explore a surprising and exciting new chapter in comet science. Recently, the Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft made unique observations of the interstellar comet 3I/ATLAS at a time when Earth- and Mars-based telescopes couldn't see it. In this livestream, communications specialist Beth Johnson and Dr

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42:32

Earth 2.0? Maybe Not. Intelligent Life Might Be Far...

SETI Live ·

2025/12/23

Get ready for a fascinating deep dive into one of the biggest questions in astrobiology: How common are biological extraterrestrial intelligences in the Milky Way? Host Simon Steel, Deputy Director of the Carl Sagan Center for Research, is joined by Manuel Scherf and Helmut Lammer (Space Research Institute, Austrian Academy of Sciences) to explore new research that challenges long-held assumptions about "Earth-like" planets and what it really takes for a world to support complex life. Recent work

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44:44

SkyMapper: Map All the Sky, All the Time

SETI Live ·

2025/12/19

In a special bonus SETI Live, communication specialist Beth Johnson welcomes astronomer and entrepreneur Franck Marchis to introduce SkyMapper, a new global network of smart telescopes and all-sky sensors designed to open the universe to everyone. SkyMapper brings together professional observatories, citizen astronomers, and classrooms into a single, decentralized platform. It enables real scientific discovery — from tracking satellites and meteors to monitoring comets and transient events in real

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29:33

Baby Moons in the Making? The Discovery of a...

SETI Live ·

2025/12/16

On this episode of SETI Live, host Moiya McTier welcomes two leading researchers—Gabriele Cugno (University of Zürich) & Sierra L. Grant (Carnegie Institution for Science)—to dive into an extraordinary discovery by the James Webb Space Telescope (JWST): a carbon-rich, moon-forming disk around the distant exoplanetary object CT Cha b, some 625 light-years away. What exactly is a "moon-forming disk"? Why is this discovery a game-changer for our understanding of how moons — and ultimately habitable

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39:09

The Moon that Could Support Life: What Cassini...

SETI Live ·

2025/12/12

Join host Beth Johnson for a fascinating episode of SETI Live, featuring planetary scientists Dr Georgina Miles and Dr Carly Howett from the University of Oxford. We'll be unpacking their groundbreaking study showing that Enceladus — one of Saturn's icy moons — may harbor a stable subsurface ocean capable of supporting life. 📄 For more info: The study "Endogenic heat at Enceladus' north pole" has just been published in Science Advances: https://www.science.org/doi/10.1126/sciadv.adx4338 Official

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34:39

Where Water Boils the Sky: Steam Worlds and the...

SETI Live ·

2025/12/09

What happens when a planet is full of water—but too hot for oceans? Meet the "steam worlds," exotic exoplanets wrapped in thick water vapor and boiling at thousands of degrees. These strange worlds may be far from habitable, but they're reshaping how scientists think about planets, water, and where life might exist. In this episode of SETI Live, host Beth Johnson talks with Artem Aguichine of the University of California, Santa Cruz, about his new research modeling the interiors and atmospheres of

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33:05

TRAPPIST‑1 e Revealed: Peering Inside an Exoplanet's...

SETI Live ·

2025/12/05

Join SETI Live host Moiya McTier with Néstor Espinoza (STScI) and Ana Glidden (MIT) for a deep dive into the latest JWST observations of TRAPPIST‑1 e, one of the most tantalizing Earth-sized planets in the habitable zone of a nearby star. In this episode, we explore: 🛰 How JWST is peering into TRAPPIST-1 e's atmosphere (or lack thereof). 🔵 Why the planet almost certainly doesn't have a thick hydrogen envelope, ruling out a mini-Neptune-like world. 🪨 The emerging hints of a secondary, heavier

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36:36

Welcome Moiya! A New Host Joins SETI Live

SETI Live ·

2025/12/02

Dr. Moiya McTier is an astrophysicist, folklorist, and science communicator in New York City who loves planets, galaxy evolution, her cat named Cosmo, and old stories about space. She is also the latest addition to our rotating cast of hosts for SETI Live! Join communications specialist Beth Johnson for an interview to introduce Moiya to the community. So please bring your questions and help us welcome her to the team! (Recorded live 3 November 2025.)

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49:48

Comet 3I/ATLAS Perihelion Update

SETI Live ·

2025/11/28

What happens when a visitor from another star system drops by? Join planetary astronomers Franck Marchis and Ariel Graykowski for a special SETI Live all about Comet 3I/ATLAS — only the third known interstellar object ever detected! Astronomers around the world, including citizen scientists in the Unistellar Network, are racing to learn as much as possible about this rare cosmic traveler. 3I/ATLAS is swinging through our neighborhood, reaching perihelion on October 30, 2025, just inside the orbit of

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40:09

This Microbe Breathes Two Ways! The Bacteria That...

SETI Live ·

2025/11/25

Join host Beth Johnson on SETI Live as she talks with Dr. Eric Boyd from the University of Montana about a groundbreaking discovery: microbes that can breathe in two ways at once! These extraordinary bacteria simultaneously perform both aerobic (oxygen-based) and anaerobic (sulfur-based) respiration, challenging everything we thought we knew about cellular life. Discover how this incredible metabolic flexibility reshapes our understanding of life on Earth, inspires biotechnology innovations, and

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41:16

The Hidden Ocean of Ariel: Tidal Forces and the Case...

SETI Live ·

2025/11/21

Could Uranus's moon Ariel have once harbored a vast, deep ocean beneath its icy crust—perhaps even one that still lingers today? In this episode of SETI Live, host Beth Johnson welcomes Caleb Strom (University of North Dakota) and Alex Pathoff (Planetary Science Institute) to discuss new research revealing evidence that Ariel may have once held a subsurface ocean over 170 kilometers deep. Using geological mapping and tidal‐stress modeling, the team shows how ancient fractures and ridges on Ariel's

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43:22

Ripples on the Cosmic Ocean: An Environmental History...

SETI Live ·

2025/11/18

Join Beth Johnson for a thought-provoking conversation with Professor Dagomar Degroot, an environmental historian at Georgetown University. They delve into the themes of his new book, Ripples on the Cosmic Ocean, set to be released on October 28, 2025. Ripples on the Cosmic Ocean offers a sweeping history of human encounters with the solar system. Professor Degroot reimagines the solar system as a dynamic network of interconnected systems, exploring how cosmic events and environments have influenced

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43:55

Do Aliens Speak Physics? And Other Questions about...

SETI Live ·

2025/11/14

Do Aliens Speak Physics?: And Other Questions about Science and the Nature of Reality (Whiteson & Warner, 2025) is a mind-bending exploration into what it would mean, scientifically and philosophically, for humans to communicate with an extraterrestrial intelligence through the language of physics. Daniel Whiteson, a particle physicist, and Andy Warner tackle deep questions: Are concepts like "number," "space," "time," and "laws of nature" universal, or are they shaped by our biology, culture, and

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35:20

Birth of Planets: JWST Spots Hot Mineral Condensation...

SETI Live ·

2025/11/11

How do planets start? Host Simon Steel (SETI Institute) speaks with Melissa McClure (Leiden University), lead author of a new study that caught the earliest spark of planet formation. Using JWST and ALMA, the team detected silicon monoxide (SiO)—both gaseous and likely crystalline—and pinpointed where hot, rock-forming minerals are condensing inside the protoplanetary disk of HOPS-315, ~1300 light-years away in Orion. They also map the action to a belt-like region similar to our Solar System's

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143 results

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