Mars looks like a dead world today. Cold, dry, and wrapped in an atmosphere barely strong enough to support liquid water. But billions of years ago, Mars was remarkably different. It had rivers, lakes, a vast northern ocean, a thicker atmosphere, active volcanoes, and the chemistry needed for life.

So what really killed Mars? 🔴

In this Snoozy Space documentary, we follow the evidence backward through Mars's history to uncover how a planet that once had the ingredients for habitability became the frozen desert we see today.

We explore the enormous Borealis impact, the collapse of Mars's ancient magnetic field, the violent activity of the young Sun, and the slow stripping of its atmosphere by solar wind. We trace the fate of Mars's ancient ocean, the water that may still survive beneath the surface, and the mysterious methane detections that continue to raise one of planetary science's biggest unanswered questions.

We also examine Olympus Mons, the missing carbon recycler, Mars's lack of plate tectonics, the possibility that microbial life once existed there, and the Perseverance samples waiting to reveal what Mars was really like.

And eventually, the story turns back toward Earth. 🌌

Mars may be more than a story about a dead planet. It may be one of the clearest natural experiments we have for understanding planetary habitability, atmospheric loss, magnetic fields, climate stability, and the fragile conditions that allow a world to remain alive.

Was Mars ever home to life?

Could anything still survive beneath its surface?
And how much of Mars's fate was determined simply by being a little smaller?
Tonight, we follow the evidence and ask the question that has followed Mars for thousands of years:
What really killed Mars?

🌙 Settle in, slow down, and explore the Red Planet with Snoozy Space.
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This episode includes AI-generated content.