Charles Darwin

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on the earth in their
present form.
After reading the works of a noted geologist, Darwin began to change his
ideas. He saw evidence that the earth was much older than 6,000 years. In South
America, he was witness to an earthquake that lifted the land several feet. He
realized that mountains could be built by the action of an earthquake over
millions of years. He found fossils of marine mammals high up on mountains, and
realized that rocks must have been lifted from the ocean.
Darwin also studied plants and animals. On the Galapagos Islands, he
found animals that resembled animals on the South American continent, but not
exactly the same. He understood that they must have come to the islands from the
mainland, and then adapted into new species. He also observed the plant and
animal life of South America, oceanic islands, and the Far East. He noted many
examples that proved that animals in similar environments didn't always look the
same. For example, the emus of Australia and ...

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