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Planet Earth’s Core May Be

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81% Informative

Study suggests iron isotopes might migrate into Earth 's rocky mantle, the next geological layer of Earth .

The study was published in the journal Nature Geoscience in 2020 .

It's extremely tricky to get samples of Earth 's deep mantle simply because of its extreme depth.

Other scientists have suggested that water from the Earth 's surface is being driven into the rocky mantle due to plate shifts.