Earth's Rotating Inner Core Shifts Its Speed
14/05/2013 08:42
14 May 2013
By Charles Q. Choi, OurAmazingPlanet Contributor | LiveScience.com
Earth's solid-metal inner core is a key component of the planet, helping to give rise to the magnetic field that protects us from harmful space radiation, but its remoteness from the planet's surface means that there is much we don't know about what goes on down there. But some secrets of the inner core are being revealed by acoustic waves passing through the planet's heart and iron squeezed to enormous pressures in the lab. [Read more] ...