A vast, unhurried journey across the restless surface of the Earth — from the molten chaos of its earliest crust through the slow waltz of ancient supercontinents, Vaalbara and Rodinia and Pangaea, assembling and breaking apart over billions of years. The episode drifts through the mechanics of tectonic motion, the convection currents deep in the mantle that push and pull the plates, the volcanism that builds new land along mid-ocean ridges and island arcs, and the quiet, grinding collisions that raise mountain ranges into the sky. Woven through the geology is the story of life itself — how the shifting of continents shaped ocean currents and climates, opened and closed seaways, isolated populations and brought them together again, guiding the long, branching path from the earliest single-celled organisms in ancient seas to the immense diversity of the modern world, including, eventually, the peculiar, upright, restless species now lying in bed listening to this.

This episode includes AI-generated content.