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The Conversation USA

How has the inside of the Earth stayed as hot as the Sun's surface for billions of years?

  • Written by: Shichun Huang, Associate Professor of Earth and Planetary Sciences, University of Tennessee
imageThe slice you see cut out of the Earth reveals its core, depicted here in bright yellow.fhm/E+ via Getty Imagesimage

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How does the inside of the Earth stay boiling hot for billions of years? Henry,...

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