Cooperative eye hypothesis Cooperative eye hypothesis The cooperative eye hypothesis is a proposed explanation for the appearance of the human eye. It suggests that the eye's distinctive visible characteristics evolved to make it easier for humans to follow another's gaze while communicating or while working together on tasks. Unlike other primates, human beings have eyes with a distinct colour contrast between the white sclera, the coloured iris, and the black pupil. This is due to a lack of pigment in the sclera. Other primates have pigmented sclerae that are brown or dark in colour. There is also a higher contrast between human skin,
The Tribal Eye The Tribal Eye The Tribal Eye is a seven-part BBC documentary series on the subject of tribal art, written and presented by David Attenborough. It was first transmitted in 1975. This episode centers on the life and customs of the Dogon people in Mali, concentrating primarily on their masks and mask rituals. After a brief introduction to the Dogon culture, the link between African and European art is elaborated upon, using works by Picasso and Braque as examples. Dogon blacksmiths are shown working on a sculpture and a monkey mask for an old woman's funeral; the funeral rites, which include