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The earth’s inner core may have stopped turning and could go into reverse, said researchers who studied seismic waves from decades of earthquakes.

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Planet Earth’s inner core may have stopped turning and could go into reverse, according to a study published this week.

Earth is formed of three layers: the crust, the mantle, and the core.

Made almost entirely of metal – specifically, iron and nickel, its inner core rests 3,200 miles below the crust, separated from the mantle by the liquid outer core which allows the inner core to rotate at a different speed from the planet’s rotation.

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