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High pressure, temperature same as the surface of the Sun, solid iron inner core, liquid outer heavy elements core - got it. But are nuclear reactions happening there?

Vorac
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  • Fission occurred very near the surface in Oklo ( Gabon ) Africa. – blacksmith37 Dec 15 '21 at 20:38
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    Uranium-$238$ fission in the Earth's centre is why most of it is still molten. It drives the convection currents responsible for tectonic drift. – J.G. Dec 15 '21 at 20:44

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