Harvard Geneticist David Reich Explains 'Who We Are And How We Got Here'

Harvard geneticist David Reich is known as a true pioneer of genetic research.  Reich's new book, "Who We Are and How We Got Here: Ancient DNA and the New Science of the Human Past," talks about how recent developments in technology and research methods have revolutionized the field and rewritten what we know about ancient human history. He also discusses how these discoveries are changing how we talk about race.

David Reich, Harvard geneticist, and author of "Who We Are and How We Got Here: Ancient DNA and the New Science of the Human Past."