Transcription: Archaeological evidence of humans and their ancestors stretches back at least 4 million years. The fossil evidence indicates that the birthplace of humankind was Africa, where one of the richest areas of archaeological discovery is the Olduvai Gorge in northern Tanzania. The earliest of these, Australopithecus aparensis, comes from eastern Africa and dates from 4 million to 2.5 million years ago. A three-foot tall adult female aparensis skeleton, who became known as Lucy, was discovered by Donald Johansson and his colleagues in Ethiopia in the mid-1970s. Lucy's bone structure proved that she c ...
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