Magnetism in Ancient Crystals Reveals the History of Earth’s Inner Core and How It Avoided Mars-Like Fate

Chris K

Chris K

Chris K
Staff member
Jul 3, 2023
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Researchers from the University of Rochester, New York, have analysed ancient rock crystals to reveal two important dates in the history of the inner core of Earth. The first was 550 million years ago, when the magnetic field began to rejuvenate. The second important date was found to be 440 million years ago, when the structure of the growing inner core changed.

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