* What Dr. Darwin thought on the Pampas

Dr. Darwin found nine sets of bones of gigantic beasts along an old riverbed. The beasts had already gone out of existence. One of them, Toxodon, was as big as an elephant but had the teeth of a rodent. Every rodent existing today, is small. This fact gave Dr. Darwin proof of the relation between animals in the past and in the present. He was very impressed.

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