Description: In our continuing series of new and occasional interviews with archaeologist newsmakers, Rick Pettigrew interviews Eske Willerslev, a pioneer in evolutionary genetics whose research team has made key breakthroughs in scientific understanding of ancient environments and evolutionary relationships. In this interview, Willerslev discusses the basics of DNA analysis and recent advances in describing the chronology and movements of human populations out of Africa to the other continents around the world, including North and South America. Strata Portraits of Humanity is a monthly half-hour newsmagazine-style show designed for the cable TV and Internet platforms. ??Each episode of the human story is a portrait building on the many layers of the human experience. This is a record we are just beginning to uncover. From that perspective, Strata delivers in-depth coverage of a wide variety of archaeological and cultural heritage topics all around the world.