Despite being able to weigh worlds orbiting other stars, humanity has always had a massive blind spot under our feet. The Earth's core is just a few thousand miles away, but might as well be at the end of the universe for all we know about it. That's not to say we know nothing, or don't have some cool theories that are being tested right now. Join us on our daily deepening voyage to the center of the Earth.
An audio-visual tour of 10 great things about living on our 'soft-core' planet with innards as hot as the Sun.
It's thousands of miles underground, beyond our reach. But Earths' core is starting to give up its powerful secrets.
Some people think that 2012 will, among other things, bring a reversal of Earth's magnetic field. Will it? Should you be concerned? James Williams finds out.
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