Thursday, September 24, 2009
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10:22 AM
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The physical characteristics of modern humans like those of all other creatures, had evolved over incrediby long periods of time. Until recently, the evidence was too fragmentary to be convincing. Charles Darwin - The origin of species; he theorized that, over very long periods of time the changes brought about by evolution could lead to distinct new species. Because humans shared so many physical similarities with African apes, he proposed that Africa must have been the home of the first humans. Since 1950, Louis and Mary Leakey and their son Richard along with many others, have discovered a wealth of early human fossils in the exposed sediments of the Great Rift valley of Eastern Africa. These finds are strong evidence for Dart's hypothesis and for Darwin's guess that the tropical habitat of the African apes was the cradle of humanity.
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laura
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