Thousands of years ago, people crossed a land bridge from Siberia to Western Alaska and dispersed southward into what we now call the Americas. The story of exactly when that was, how they did it, and who they were has fascinated us for a long time as excavations have uncovered pieces of those stories. University of Kansas Associate Professor of Anthropology Jennifer Raff joins us to talk about her book "Origin: A Genetic History of the Americas", digging into the ways modern genetics is being used to help us understand the history of people dispersing across the Americas. Along the way we learn more about how scientists have mis-stepped in their interactions with Indigenous people, and how new partnerships are being created to more respectfully investigate this history.