We are all interested in our roots – our family history. The ability to uncover our personal histories has been greatly enhanced by commercially available DNA testing kits. In Who We Are and How We Got Here, David Reich explains how this urge to know our ancestors has led to the development of technologies to sequence and analyze DNA extracted from the bones of long-dead ancestors, and how this work has revolutionized the study of our species' history.

Reich is a professor of genetics at Harvard Medical School and a Howard Hughes Medical Institute investigator. Over the past two decades, technological advances have enabled scientists like Reich to extract and analyze DNA from...

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