Earth’s rotating inner core is starting to slow down — and it could alter the length of our days

A new study confirms that Earth’s inner core has been rotating more slowly than usual since 2010. This mysterious “backtracking” could also end up slightly altering the planet’s overall rotation, lengthening our days.

The heart of our planet has been spinning unusually slowly for the past 14 years, new research confirms. And if this mysterious trend continues, it could potentially lengthen Earth’s days — though the effects would likely be imperceptible to us.

Earth’s inner core is a roughly moon-size chunk of solid iron and nickel that lies more than 3,000 miles (4,800 kilometers) below our feet. It is surrounded by the outer core — a superhot layer of molten metals similar to those in the inner core — which is surrounded by a more solid sea of molten rock, known as the mantle, and the crust. Although the entire planet rotates, the inner core can spin at a slightly different speed as the mantle and crust due to the viscosity of the outer core.

Read Full Article Here…(livescience.com)

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