One of the things that makes us different from other animals is the way we move around on two feet. Figuring out how and why our ancestors first stood up is one of the big questions in the study of human evolution. Carol Ward is an anatomy professor at the University of Missouri, and she's a paleoanthropologist who studies locomotion in our earliest primate ancestors. She tells the story of one bone and how it answered a question about how one of our most famous early ancestors moved.

This is the first episode of Origin Stories, The Leakey Foundation's monthly podcast about anthropology, human origins, evolution, and human and primate behavior. We'll explore what it means to be human and the science behind what we know about ourselves.

This show is a project of The Leakey Foundation.