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The Roots of a Theory: How Plants Specimens Led a Young Darwin to Discovery

Plant specimens may seem an unlikely starting point for Darwin's theory of evolution by natural selection - but, as Professor John Parker investigates in this podcast, the Cambridge botanist John Stevens Henslow proved a crucial mentor for the young naturalist. Find out how Darwin shipped his collections from the Beagle voyage back to Cambridge, and how these almost 200 year-old specimens can today give us a snapshot of long-extinct botanical life.

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