reading explorer 4 본문 독해 5A
- 최초 등록일
- 2012.03.06
- 최종 저작일
- 2012.03
- 5페이지/
한컴오피스
- 가격 1,000원
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reading explorer 4 본문 독해
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5A The DNA Trail
The Greatest journey
Everybody loves a good story, and when it’s finished, this may be the greatest one ever told. It begins in Arica with a group of people, perhaps just a few hundred, surviving by hunting animals and gathering fruits, vegetables, and nuts. It ends about 200,000 years later with their six and a half billion descendants spread across the Earth, living in peace or at war, their faces lit by campfires and computer screens.
In between is an exciting tale of survival, movement, isolation, and conquest, most of it occurring before recorded history. Who were those first modern people in Arica? What routes did they take when they left their home continent 50,000 years ago to expand into Europe and Asia? When and how did humans reach the Americas? For decades the only proof was found in a small number of scattered bones and artifacts our ancestors left behind on their journeys. In the past 20years, however, increasingly refined DNA technologies have allowed scientists to find a record of ancient human migrations in the DNA of living people.
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