Episode Details

Earth’s core is cooling way faster than scientists once thought—possibly in just millions, not billions, of years. This hidden heat engine powers plate tectonics, volcanoes, and our protective magnetic field. A faster cooldown could mean more frequent or intense geological events, a weaker magnetic shield, and eventually, a quieter, less volcanically active planet. New research is piecing together clues from seismic waves and ancient rocks to unravel this planetary mystery—reshaping how we see Earth’s long-term evolution.

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