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October 9 2013

How Earth's Core Got Its Iron


Billions of years ago, the newborn Earth morphed from a messy ball of mixed-up rock to a perfectly layered planet with an iron core.

A new model explaining this mysterious process suggests the core was created as dribs and drabs of iron percolated inward from Earth's lower mantle, according to a study published Oct. 6 in the journal Nature Geoscience. The mantle is the viscous, rocky layer between the crust and Earth's iron core.

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