Episode Details

Earth’s core might be cooling faster than we thought, according to new research using ancient deep-Earth minerals as thermal time capsules. Scientists are piecing together the planet’s heat history by analyzing magnesium-rich minerals like ferropericlase, formed up to two billion years ago. These clues suggest the core has lost significant heat since Earth’s early days — a development that could slow plate tectonics and weaken our planet’s protective magnetic field sooner than expected. Think of it as studying a giant furnace’s burn rate through its embers — revealing that even our most stable planet is quietly evolving.

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