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GeoffW1
21-05-2015, 05:18 PM
Hi,

This would be apparently quite quick once you overcame a few small difficulties:

http://www.abc.net.au/science/articles/2015/05/19/4236492.htm

Cheers

goober
22-05-2015, 06:42 AM
I recall this being discussed a few years ago (on QI?) and they came to the same conclusion.

For those into that sort of thing, Melvyn Bragg's excellent In Our Time podcast featured The Earth's Core a few weeks back. It was very good.