Scientists have found that there is an extra innermost core at the center of the Earth made entirely of iron, measuring 400 miles in diameter.

There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity ...

This part of Earth runs to a depth of around 1,800 miles (2,900 km), according to the Seismin project, and there's an upper mantle and a lower mantle. Earth's internal temperature increases ...

Related: Earth's mysterious innermost core is a 400-mile-wide metallic ball Earth's inner core is a solid ball of mostly iron and nickel.Measuring about 1,520 miles (2,440 kilometers), this inner ...

The Earth's internal layers including the mantle, outer core and inner core. New research shows the inner core undergoes structural transformation likely caused by outer core disturbance. The ...

The Earth's internal layers including the mantle, outer core and inner core. New research shows the inner core undergoes structural transformation likely caused by outer core disturbance.

T here's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity.

An analysis of Hawaii’s volcanic rocks revealed Earth’s core is leaking gold and other precious metals, a study found. The elements emerge when ocean islands form.

Earth’s core is pretty dynamic. Its spin speeds up and slows down based on how its two primary layers are behaving. As we improve the waveform techniques used to study the deepest layer ...

Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.