What Lies 4,000 Miles Deep Inside the Earth? @WonderDocs
What Lies 4,000 Miles Deep Inside the Earth?  @WonderDocs
Uploaded April 2026 | Updated September 2026, 1 week ago
The Earth is a machine, and most of us have no idea how it works. Beneath our feet lies a restless, violent world of shifting tectonic plates, subterranean rivers, and a core as hot as the surface of the sun. In this episode of Wonder, we peel back the layers of the planet — from the 100,000-square-mile aquifer beneath Florida to the deadly fault lines splitting California’s stadiums in two.

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What Lies 4,000 Miles Deep Inside the Earth?

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