Why We Know Earth's Inner Core Is Solid. Earth's inner core is a roughly 1,500-mile-wide sphere made mostly of iron and nickel. It sits inside the planet's liquid outer core, which itself is ...

Earth’s inner core is a roughly 1,500-mile-wide sphere made mostly of iron and nickel. It sits inside the planet’s liquid outer core, which itself is nestled beneath the mantle and crust. The inner ...

The newly discovered doughnut-shaped region sits at the top of the Earth’s outer core, precisely where the liquid core meets the mantle (the layer that surrounds the Earth’s core).

Like an onion, the Earth has layers.The scientific community knows about four such layers: The outer crust is the thinnest layer, and it is where we live. Below that is the thick mantle, which ...

The inner core is solid and separated from the semi-solid mantle by the liquid outer core, which allows the inner core to rotate at a different speed than the Earth as a whole. At times, the inner ...

The outer core, with a radius of approximately 2,200 kilometers, is believed to be composed mostly of a liquid iron-nickel alloy, formed by heavy elements sinking towards the center of the Earth.

A doughnut-shaped region thousands of kilometres beneath our feet within Earth’s liquid core has been discovered by scientists from The Australian National University (ANU), providing new clues ...

Water leaking into the Earth may be wrapping the core in crystals, a study has suggested. The study may help explain a weird area in the outer core that has long puzzled scientists.

The inner core of the Earth appears to hold an innermost secret. Geology textbooks almost inevitably include a cutaway diagram of the Earth showing four neatly delineated layers: a thin outer ...

According to their modeling, the outer core has a radius of about 362 kilometers (225 miles), and the inner core has a radius of about 258 kilometers (160 miles). That's about 15 percent of the ...