Lee Berger, National Geographic Explorer in Residence and paleoanthropologist, shares his adventurous journey discovering ancient hominid fossils in South Africa. He recounts his son’s remarkable find that turned their research around. Berger delves into the revolutionary discoveries within an extraordinary cave, sparking a new understanding of human origins. The conversation touches on the thrill of fossil hunting, the unexpected emotional experiences of the 'underground astronauts,' and how these findings challenge traditional views of what it means to be human.