史前人类不可能坐上越洋航线,但他们却成功地完成了跨越大洋之举。中德科学家在最近发表的一篇论文中提出,4万年前,亚洲和美洲土著人共同的祖先还居住在北京。但除了这个发现,该论文的学术价值更在于一项技术发明——研究团队设计并实施了一种方法,成功地从古人类遗骨中提取了核DNA,这在科学史上还是首 Prehistoric humans can not get on the ocean route, but they have successfully completed the move across the ocean. In a recent paper, scientists in China and Germany proposed that the common ancestor of Asian and American indigenous peoples lived in Beijing 40,000 years ago. But beyond this discovery, the academic value of the dissertation lies in a technical invention that the research team designed and implemented a method to successfully extract nuclear DNA from the remains of ancient human beings, which was the first in the history of science