New Theory Explains How Earth's Inner Core Remains Solid Despite Extreme Heat
Earth Core - an overview
Sondeando la posibilidad de vida en las “Súper-Tierras
If the Earth's inner core is solid due to a very high temperature
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The Interior of the Earth
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Earth's inner core - Wikipedia
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Even though the earth's inner core is hotter than the liquid outer core, is it still solid? - Quora