Richard Dawkins: Distribution of Life: The Iguanas of Galápagos
Richard Dawkins explains how the distribution of life on Earth's continents and islands is exactly as we should expect if life evolved, and exactly how we should NOT expect if it had been created....
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[waves splashing] Both the marine and land iguanas of the Galapagos resemble land Iguanas found on the South American mainland, about 600 miles to the east. No doubt it was a freak accident that delivered them first to the newly formed volcanic islands of Galapagos. Thereafter, the fact that there were several different islands in the archipelago enabled them to diverge. The marine iguana, which is found nowhere but on Galapagos, presumedly evolved on one island only at first then later spread to the other islands, where they diverged into all the different varieties that are now found. This is a land iguana. It was land iguanas that first colonized the Galapagos islands and then evolved separately into the modern land iguanas he...
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[waves splashing] Both the marine and land iguanas of the Galapagos resemble land Iguanas found on the South American mainland, about 600 miles to the east. No doubt it was a freak accident that delivered them first to the newly formed volcanic islands of Galapagos. Thereafter, the fact that there were several different islands in the archipelago enabled them to diverge. The marine iguana, which is found nowhere but on Galapagos, presumedly evolved on one island only at first then later spread to the other islands, where they diverged into all the different varieties that are now found. This is a land iguana. It was land iguanas that first colonized the Galapagos islands and then evolved separately into the modern land iguanas he...
