Planetary scientist Bethany Ehlmann has co-authored a paper presenting evidence that liquid surface water flowed on Mars as much as a billion years more recently than previously thought. That’s an extra billion years for possible life to have formed and thrived. We’ll also join Planetary Society editor Rae Paoletta as she explores water worlds throughout our solar system in a new article. Another great prize awaits the winner of the What’s Up space trivia contest. Discover more at https://www.planetary.org/planetary-radio/2022-bethany-ehlmann-mars-water

Planetary scientist Bethany Ehlmann has co-authored a paper presenting evidence that liquid surface water flowed on Mars as much as a billion years more recently than previously thought. That&rsquo;s an extra billion years for possible life to have formed and thrived. We&rsquo;ll also join Planetary Society editor Rae Paoletta as she explores water worlds throughout our solar system in a new article. Another great prize awaits the winner of the What&rsquo;s Up space trivia contest. Discover more at <a href="https://www.planetary.org/planetary-radio/2022-bethany-ehlmann-mars-water">https://www.planetary.org/planetary-radio/2022-bethany-ehlmann-mars-water</a>

Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you inside the DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

Planetary Radio brings you the human adventure across our Solar System and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts who are taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye the Science Guy and Bruce Betts as they dive deep into space science and exploration. The monthly Space Policy Edition takes you inside the DC beltway where the future of the US space program hangs in the balance. Visit planetary.org/radio for an episode guide and much more.

Planetary Radio: Space Exploration, Astronomy and Science

Planetary Radio brings you the human adventure across our solar system and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye, the Science Guy, and Bruce Betts, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

Planetary Radio brings you the human adventure across our solar system and beyond. We visit each week with the scientists, engineers, leaders, advocates, and astronauts taking us across the final frontier. Regular features raise your space IQ while they put a smile on your face. Join host Sarah Al-Ahmed and Planetary Society colleagues including Bill Nye, the Science Guy, and Bruce Betts, chief scientist for The Planetary Society, as they dive deep into the latest space news. The monthly Space Policy Edition takes you inside the DC beltway with Casey Dreier and Jack Kiraly to discuss the politics of space exploration in the US and advocacy actions you can take to support the missions that matter. Visit planetary.org/radio for the space trivia contest, an episode guide, and much more.

Water may have flowed on Mars for a billion more years than was previously thought, giving possible life an extra billion years to thrive.

Water, water everywhere with Bethany Ehlmann

Where are we most likely to find evidence of life, past or living, in the Solar System? Planetary scientist and author Kevin Hand looks to warm, salty ocean depths beneath protective layers of ice on worlds such as Europa and Enceladus. His enthralling book became a popular selection in The Planetary Society’s member book club. He recently joined the Society’s Mat Kaplan for a deep exploration of the best science. Kevin also shared tales of his own harrowing, revealing journeys through Earth’s undersea world.

Discover more at: https://www.planetary.org/planetary-radio/book-club-kevin-hand

Where are we most likely to find evidence of life, past or living, in the Solar System? Planetary scientist and author Kevin Hand looks to warm, salty ocean depths beneath protective layers of ice on worlds such as Europa and Enceladus. His enthralling book became a popular selection in The Planetary Society&rsquo;s member book club. He recently joined the Society&rsquo;s Mat Kaplan for a deep exploration of the best science. Kevin also shared tales of his own harrowing, revealing journeys through Earth&rsquo;s undersea world.
Discover more at: https://www.planetary.org/planetary-radio/book-club-kevin-hand

Planetary scientist Kevin Hand joins us for a deep exploration of his excellent book about the search for life in the oceans of other worlds.

Book Club Edition: Alien Oceans by Kevin Hand

This is part two of our Star Trek 60th anniversary series. Robert Picardo, the Emergency Medical Hologram on Star Trek: Voyager and a member of The Planetary Society's board of directors, reads a vintage letter from Star Trek creator Gene Roddenberry asking fans to join a brand new organization called The Planetary Society. Tim Russ, who played Tuvok on Star Trek: Voyager, Deep Space Nine, Lower Decks, and Picard, joins us to talk about what the Vulcans can teach us about the discipline we'll need to survive in deep space, and shares his own experience as an amateur astronomer who contributed data to NASA's Lucy mission. Karim Diané, Jay-Den Kraag on Star Trek: Starfleet Academy, talks about playing a Klingon who defies everyone's expectations of what it means to be strong. And Bruce Betts, chief scientist of The Planetary Society, is here with What's Up, discussing Star Trek technologies.

Discover more at: https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-2

This is part two of our Star Trek 60th anniversary series. Robert Picardo, the Emergency Medical Hologram on Star Trek: Voyager and a member of The Planetary Society's board of directors, reads a vintage letter from Star Trek creator Gene Roddenberry asking fans to join a brand new organization called The Planetary Society. Tim Russ, who played Tuvok on Star Trek: Voyager, Deep Space Nine, Lower Decks, and Picard, joins us to talk about what the Vulcans can teach us about the discipline we'll need to survive in deep space, and shares his own experience as an amateur astronomer who contributed data to NASA's Lucy mission. Karim Dian&eacute;, Jay-Den Kraag on Star Trek: Starfleet Academy, talks about playing a Klingon who defies everyone's expectations of what it means to be strong. And Bruce Betts, chief scientist of The Planetary Society, is here with What's Up, discussing Star Trek technologies.
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-2">https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-2</a>

In part two of our Star Trek 60th anniversary series, Tim Russ, Tuvok from Star Trek: Voyager, and Karim Diané, Jay-Den Kraag from Star Trek: Starfleet Academy, explore what the Vulcans and the Klingons can teach us about becoming the people who deserve to reach the stars. 

Star Trek at 60: What Vulcans and Klingons can teach us about being human (Part 2)

Star Trek turned 60 on Sept. 8, 2026, and to celebrate, we're kicking off a special two-part series exploring the franchise's deep and lasting connection to real-world space exploration. In Part 1, Robert Picardo, the Emergency Medical Hologram from Star Trek: Voyager, now starring in Star Trek: Starfleet Academy and a member of The Planetary Society's Board of Directors, joins Sarah Al-Ahmed to trace the relationship between Star Trek and The Planetary Society all the way back to a 1980 letter from Gene Roddenberry himself. Bob talks about how playing a holographic doctor for 30 years led him to become a real-world space advocate, and what Star Trek's non-human characters can teach us about what it means to be human. Then, Bruce Betts, Planetary Society Chief Scientist, joins for What's Up and a discussion of solar sails in the franchise.

Discover more at: https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-1

Star Trek turned 60 on Sept. 8, 2026, and to celebrate, we're kicking off a special two-part series exploring the franchise's deep and lasting connection to real-world space exploration. In Part 1, Robert Picardo, the Emergency Medical Hologram from Star Trek: Voyager, now starring in Star Trek: Starfleet Academy and a member of The Planetary Society's Board of Directors, joins Sarah Al-Ahmed to trace the relationship between Star Trek and The Planetary Society all the way back to a 1980 letter from Gene Roddenberry himself. Bob talks about how playing a holographic doctor for 30 years led him to become a real-world space advocate, and what Star Trek's non-human characters can teach us about what it means to be human. Then, Bruce Betts, Planetary Society Chief Scientist, joins for What's Up and a discussion of solar sails in the franchise.
Discover more at: <a href="https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-1">https://www.planetary.org/planetary-radio/2026-star-trek-at-60-part-1</a>

Robert Picardo, the Emergency Medical Hologram from Star Trek: Voyager and now Starfleet Academy, traces the sixty-year bond between Star Trek and The Planetary Society, from Gene Roddenberry's 1980 letter to the halls of Congress. 

Water, water everywhere with Bethany Ehlmann

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