The chemistry on Earth's sister planet doesn't add up | Sara Seager
March 10, 2026
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7:52Now PlayingThe chemistry on Earth's sister planet doesn't add up | Sara Seager
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as posted by the channelThis interview is an episode from The Well, our publication about ideas that inspire a life well-lived, created with the John Templeton Foundation.
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Watch Seager’s next interview ► We may find alien life, but will we be able to accept the consequences?
What would it take to find another Earth, if one even exists?
Astrophysicist and planetary scientist Sara Seager explores the search for Planet B, a true Earth-like exoplanet with continents, oceans, sunlight, and a thin atmosphere capable of supporting life. The search for Earth’s Twin helps scientists understand planetary habitability, the origins of life on Earth, and how rare Earth-like conditions may be in the universe.
Seager’s work centers on exoplanets, Earth-like planets, habitable zones, planetary atmospheres, and chemical signs of life, while also examining Venus, phosphine gas, and why finding a second Earth remains one of astronomy’s greatest challenges.
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About Sara Seager:
Professor Seager is Director for the MIT-led Venus Morning Star Missions to Venus and lead for Project Starshade. In the past she was Deputy Science Director for the MIT-led NASA mission TESS and PI for the on-orbit JPL/MIT CubeSat ASTERIA.
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Do we inhabit a multiverse? Do we have free will? What is love? Is evolution directional? There are no simple answers to life’s biggest questions, and that’s why they’re the questions occupying the world’s brightest minds.
Together, let's learn from them.
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