A piece of Europe 5 km down, heated to 240°C and later returned to the surface. How? Fossilised wood shows

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How Fossilised wood shows the history of Europe Imagine you are holding a piece of fossilized wood. It might, at first sight, seem to be nothing more than a well-preserved relic of some ancient forest. But within its crystalline framework is a geolog... [4483 chars]

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