I pulse through lifeless stone, releasing heat from deep within, unceasing and slow. What am I?
Category: Science · Difficulty: expert
Hint: Think about what fuels volcanic and geothermal activity beneath us.
Answer
Radioactive decay in Earth's interior
Explanation
Radioactive decay of elements inside Earth generates heat that drives mantle convection and volcanic activity.
This is a expert science riddle — one of the harder riddles here. The answer is Radioactive decay in Earth's interior.
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