00:00What if the secret to life on Earth was hidden deep beneath our feet?
00:04NASA scientists have just uncovered a stunning 540-million-year rhythm
00:09connecting Earth's magnetic field to the rise and fall of oxygen in our atmosphere.
00:14This magnetic field is powered by molten metal swirling in Earth's core,
00:18and it acts like a massive shield, protecting our air from being stripped away by the sun.
00:23But here's the twist. When the magnetic field shifts, so do oxygen levels.
00:27And the pattern? It matches perfectly with the timeline of complex life on Earth.
00:32By studying ancient rocks, researchers found that both oxygen and magnetism move in sync like a slow-motion dance.
00:39This discovery hints that the forces shaping life on the surface may be driven by deep, invisible movements far below it.
00:46It could even explain how life evolved, and might help us find life on other planets, too.
00:52The Earth's core may be quietly steering life itself.
00:55And we're just starting to understand how.
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