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Heikki Stoeckli

Why the Earth Is Still Hot: The Physics of Planetary Heat and Radioactive Decay
Physics

Why the Earth Is Still Hot: The Physics of Planetary Heat and Radioactive Decay

Beneath our feet, the Earth is not stable and inert, but thermally alive. Temperatures in Earth's inner core exceed approximately 5,500 °C (comparable to the Sun's surface temperature), yet Earth formed approximately 4.5 billion years ago. Given this immense age, the question arises: “Why
09 Mar 2026 4 min read
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