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Suppose That All Animals and All Plants are Represented by the Branch of a Tree, the Tree of Life
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BBC Two
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On the Galapagos Islands, Darwin observed subtle differences between the inhabitants of one island a... Mais
On the Galapagos Islands, Darwin observed subtle differences between the inhabitants of one island and those of another.
But he nearly missed the significance of the little brown finches. Some had beaks thin enough to pick up seeds from the hard ground; others had beaks thick enough to crack a nut. Here was the clue which led him directly to the theory of natural selection.
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