Dr Mark Shriver, who studies human origins at Penn State University, is interested in ancestry, variations in skin and hair colour, facial features and height.

宾夕法尼亚州立大学研究人类起源的马克·施莱佛博士感兴趣的是血统，皮肤和头发的颜色、面部结构和身高的变化。

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Yet two-fifths of Americans still refuse to accept that human beings share a common ancestry with animals, preferring to believe that they were created in their present form in the past 10, 000 years.

但是仍旧有2/5的美国人拒绝接受人类和动物享有共同的组先的观点；他们宁愿相信他们是在过去的10，000年前被创造成他们现在的样子。

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As he is at pains to point out, this is very much our human tale, our ancestry.

作者十分痛苦地指出这本书很大程度上是关于人类的故事，人类的祖先。

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Yet two-fifths of Americans still refuse to accept that human beings share a common ancestry with animals, preferring to believe that they were created in their present form in the past 10, 000 years.

ECONOMIST: The evidence for evolution

Manfred Kayser says ancestry markers can - at best - trace an individual to a broad region: "Human migration history has produced no sharp genetic borders and no sharp appearance borders, " he explains.

BBC: Painting a suspect's portrait with DNA