Archeologist Sissel Schroeder fills us in on some of the latest discoveries about the earliest Americans. We'll find out where they came from, how they got to the New World and how quickly did they spread across the continent. We'll get a picture of what Wisconsin was like when the first people arrived, what they hunted, and how responsible they were for the extinction of ice age animals. We'll also get a sense of why they came to the Americas in the first place.