For centuries we have dreamt of reaching the center of the Earth. Now scientists are uncovering a bizarre and alien world that lies 4,000 miles beneath our feet, unlike anything we know on the surface.
It is a planet buried within the planet we know, where storms rage within a sea of white-hot metal and a giant forest of crystals make up a metal core the size of the Moon.
Horizon follows scientists who are conducting experiments to recreate this core within their own laboratories, with surprising results.
This documentary is available for preview only. Get it at Amazon.com.