# This Planet Might Be Alive

Page: https://stenobird.com/podcast/mysteries-of-the-universe-7215471/this-planet-might-be-alive
Text version: https://stenobird.com/podcast/mysteries-of-the-universe-7215471/this-planet-might-be-alive.md
Podcast: [Mysteries of the Universe](https://stenobird.com/podcast/mysteries-of-the-universe-7215471)
Published: 2026-03-09T19:33:00+00:00
Episode link: https://podcasters.spotify.com/pod/show/val62218/episodes/This-Planet-Might-Be-Alive-e3fdear
Audio file: https://anchor.fm/s/10295a79c/podcast/play/115832603/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-1-21%2Ff6f7aec6-1a03-2075-ff09-019bd66cf35e.mp3
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JSON: https://stenobird.com/v1/public/podcasts/mysteries-of-the-universe-7215471/episodes/this-planet-might-be-alive
Duration seconds: 895

## Resource

In this episode, we journey to K2-18b , a "sub-Neptune" exoplanet that has become the center of a profound scientific debate. Orbiting a cool red dwarf star, this world sits in the elusive "Habitable Zone," but it is unlike anything in our own solar system. With a mass eight times that of Earth and an atmosphere rich in hydrogen, K2-18b might be a Hycean world —a planet covered entirely by a massive liquid ocean. It challenges us to rethink what a "habitable" world looks like and reminds us that the first aliens we find might not be walking on land, but swimming in a global, alien sea.

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## Transcript

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