Seattle dentist Barney Clark received the first complete artificial heart implant in 1982 and lived on for three post-operative months. NOVA investigates the risk, costs and controversies surrounding the development of the artificial heart.

Remote tribes and exotic islanders have been made known to the world through the lens of anthropology. But in recent years, some of these people have begun to object. NOVA travels to Margaret Mead's Papua New Guinea and looks at anthropology from the other side.