1. The Origins Of Humans.
This occurred when the Arabian Plate and the African Plate began to move apart, resulting in a fissure just below the Red Sea, called Great Rift Valley. ... Aboard the Beagle, Darwin realized that some of his own observations of fossils and living plants and animals cast doubt on some accepted scientific theories. He noted, for example, that certain fossils of supposedly extinct species closely resembled living species in the same geographical area. ...
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