Blundell, Stephen

In Our Time: The Earth's Core

Despite being relatively close to us the inside of the Earth, and particularly the core of the Earth, is difficult to investigate. Primarily because we can't just look at it - and the deepest mines or boreholes are only 10km deep which is tiny compared to the 6,000km that is the Earth's radius. So everything needs to be logically deduced from the readings that we can take.

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