[VIDEO] In this episode, you'll begin at the Cradle of Humankind in South Africa, where scientists unearthed the missing piece of a fossilized spinal structure of an ancient human ancestor. Why should you be intrigued by this paleoanthropological finding? “It’s exciting,” Professor Scott Williams explains, “Because one of the main questions we have in paleontology is, when did bipedalism evolve? How did it evolve?” Watch the video to gain a better understanding of the mysterious origins of humankind.