Scientists discover core deep inside Earth — a solid ball of iron and nickel

Researchers on Tuesday said an intensive study of Earth’s deep interior confirmed the existence of a distinct structure inside our planet’s inner core.
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Earth's Mysteriously Light Core Contains Brimstone

Scientists discover massive solid metal ball inside Earth's core

Is Earth's Core Lopsided? Something Strange Is Going On in Our Planet's Interior

Earth has a hidden layer, and no one knows exactly what it is

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Scientists find our planet's inner core has ANOTHER core of its own

Is the Earth's inner core spinning in reverse?

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How We Know What's Deep Inside the Earth, Despite Never Traveling There