Science
Fault Lines
Every week, two geology obsessives pick apart a single moment that changed everything about this planet.
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Episodes
The archive
14 episodes, newest first.
- When Earth Kept Freezing Itself Over and OverSeven hundred million years ago Earth was supposedly locked in the most extreme ice age in planetary history, but two 2026 studies are tearing that picture apart. Ola and Amara reconstruct the Snowball Earth debate and argue about whether 56 million years of chaos under the ice was a prison or the pressure cooker that built animal life.
- How the Ocean Stole Earth's GreenhouseSixty-six million years after the asteroid, Earth should still be a sweaty tropical world. Ola and Amara dig into a 2026 PNAS study that says a slow collapse in ocean calcium is what actually flipped the planet into the ice age we live in now.
- When Volcanoes Ended the WorldThe 46th anniversary of Mount St. Helens just passed, and Washington is deep into Volcano Awareness Month. Ola and Amara use the most destructive eruption in US history as a doorway into the truly incomprehensible volcanic events that periodically reset life on Earth.
- The Day Earth Almost Died252 million years ago, the Siberian Traps volcanoes triggered a kill chain that erased 90% of marine life and 70% of land species. Ola and Amara reconstruct the Great Dying blow by blow, then argue about what a January 2026 study revealing chaotic, top-heavy recovery actually tells us about how life bounces back.
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What the show is
The asteroid that killed the dinosaurs. The day oxygen poisoned the atmosphere. The snowball that froze Earth from pole to pole. Each episode reconstructs one turning point in deep time, walks through the competing scientific theories, and argues about what the evidence actually proves. Built for curious people who want to understand how Earth became the place we live on, with no geology degree required.
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