On the heels of Artemis II, our cultural obsession with space colonization continues, even as we face increasing global resource constraints and planetary health declines. Techno-optimists, including some of the wealthiest among us, dream of a future where we mine, travel to, and colonize other planets – all in the hopes of bypassing the problems we now face on Earth. But from the perspective of physics and ecology, how feasible is space colonization – and are these interplanetary ambitions blinding us to the miracle of the planetary spaceship we already inhabit?

In this episode, Nate welcomes back astrophysicist Tom Murphy and eco-interventionist DJ White, two longtime friends with deep roots in both space science and ecological reality, to examine the surging cultural fascination with space mining and off-world colonization. Drawing on decades of experience with NASA missions, lunar laser ranging, and biophysical research, Tom and DJ outline the economic impossibility of asteroid mining, the physiological brutality of long-duration spaceflight, and the absurdity underlying dreams of Mars colonization. Both guests also argue that space colonization has, at its core, become a convenient story that lets humanity off the hook for the damage being done here at home.

What if the real tragedy isn't that we can't reach the stars – it's that we've stopped paying attention to the planetary home we're already on? If the most brilliant minds drawn to space exploration redirected that energy toward the living systems collapsing around us right now, what might become possible? And what if we could recognize that the complexity, beauty, and intelligence we hope to discover elsewhere in the cosmos is, improbably and urgently, still here?

(Conversation recorded on February 24th, 2026)

About Tom Murphy:

Tom Murphy is a Professor Emeritus of the Department of Physics and the Department Astronomy and Astrophysics at the University of California San Diego. He retired in 2023 and moved to Washington State to focus more on the predicament of modernity and its ecological incompatibilities. He is the author of Energy and Human Ambitions on a Finite Planet, creator of the Metastatic Modernity video series, and continues to explore long-term human success through his Do the Math blog.

About DJ White:

DJ White is a co-founder of Greenpeace International and founder of EarthTrust. He has played a leading role in protecting dolphins, whales, sea turtles, and countless other marine animals, including successfully stopping a national dolphin drive kill and breaking the deadlock in capping the Kuwait oil fires. Additionally, he helped end the world's largest and most destructive global fishery – pelagic driftnetting – and created the lab which first demonstrated self-awareness in the universe outside the great apes.

Show Notes and More

Watch this video episode on YouTube

Want to learn the broad overview of The Great Simplification in 30 minutes? Watch our Animated Movie.

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The Fantasy of Space Colonization: The Spaceship We're Already On with Tom Murphy & DJ White | RR 24

The Great Simplification with Nate Hagens