The skull of a proto-Nazcan person (c. 200-100 BC), which has been artificially shaped. In the proto-Nazcan culture, this was achieved by binding a cushion to an infant's forehead and a board to the back of the head, creating an elongated shape. It is unknown why this was done; theories suggest that this was meant to create an ethnic identity, form the individual into a social being, or illustrate social status.Photograph: Didier Descouens