Researchers are now trying to understand the "innermost inner core" of the Earth by studying how seismic waves travel through the Earth.

A Mysterious Discovery in Earth’s Heart The Earth’s inner core, composed mainly of solid iron and nickel, is one of the most enigmatic regions of the planet.It has long been known that the ...

Deeper still is the Earth's hot, liquid iron-nickel outer core, larger than the moon. Like a peach pit, at the very center is the inner core, some 1,500 miles across. The ways seismic waves reflect ...

The Earth's interior is composed of four layers ... in diameter. Although this inner core is white hot, the pressure is so high the iron cannot melt. The iron isn't pure—scientists believe ...

3. Explain that the Earth is made of three main layers: crust, mantle, and core. Draw them on the board using colored chalk. Explain that the core is divided into two layers: solid inner core and ...

The university and Sandia's Nevada site beat out a volcanic area in Bend, Oregon, the Idaho National Laboratory near Idaho ...

The outer core is liquid iron and nickel and generates the Earth's magnetic field. And the inner core is made of solid iron and nickel. The surface of the earth is constantly changing. It's the ...

Recent seismic data from 121 earthquakes recorded over three decades challenges previous beliefs about Earth's inner core. Researchers from the University of Southern California discovered ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right). Likewise, a wire passing through a magnetic field creates an electric current ...