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Submission Earth's core made in miniature->

ananyo writes: A 3-metre-tall metal sphere full of molten sodium is about to start work modelling the Earth's core. The gigantic dynamo, which has taken researchers 10 years to build, "will generate a self-sustaining electromagnetic field that can be poked, prodded and coaxed for clues about Earth's dynamo, which is generated by the movement of liquid iron in the outer core."
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Earth's core made in miniature

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