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Horizon: The Core
E4 of 14
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We will never be able to dig to the earth’s core. We may be able to travel into space, but the pressures and temperatures under the Earth’s crust make it a no-go area for humans. But as this
explains, that hasn’t stopped resourceful scientists finding other ways to explore the extreme strangeness of the deep, subterranean world.
Seismologists have used the echoes of earthquakes to work out that not only is there a swirling mass of liquid metal 4000 miles beneath our feet (which, by the way, creates the magnetic field that protects us from the solar wind) but also in the midst of that is a solid metal ball the size of the moon, covered in a forest of vast crystals. How they worked all this out is very clever and helps explain why the earth’s magnetic field will probably, in the next few thousand years, reverse.
Documentary following the scientists conducting experiments that try to recreate the conditions in Earth's core, an area 4,000 miles below the surface where storms rage in a sea of white-hot metal and a giant forest of crystals occupies a space the size of the moon.
Cast & Crew
Full Episode Guide
Horizon editor Steve Crabtree: Moors Murderer Ian Brady sent me a Christmas card
As part of his research for Horizon: What Makes a Psychopath? Crabtree shared handwritten correspondence with one of Britain’s most notorious killers
How The Natural History Museum moved Dippy the Dinosaur
Why the driverless car will change everything – forever
What's it like to battle with a dozen people talking inside your head?
BBC may lose the right to make long-running science series Horizon
8 hair care myths untangled
The contradictions of drugs in sport
Jimmy Carr to host Horizon special on the science of laughter
To vape or not to vape: are E-cigarettes a miracle or a menace?
BBC science series Horizon is going to show us how to be immortal in 2016
6 things people often get wrong about OCD
Horizon: OCD - a Monster in my Mind "busts the myth that OCD sufferers are just neat-freaks and reveals the agony of the real thing"