http://www.bbc.co.uk/news/science-environmentThe centre of the earth is a thousand degrees hotter than previously thought, which makes it as hot as the surface of the sun.
The pressure at the core is about a million times that at sea-level. That's a lot.
It is a lot. Unsurprisingly at that pressure, the core is crystalline.
It's the structure of the core at that pressure and temperature that the scientists think is responsible for the magnetic field that protects us from the solar winds, without which we wouldn't exist and any life on earth (if there was any) would be very different.
Absolutely. And that is why we get sights like this...
Click to see full-size image. |

...because, from above...
