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 Eye of the Giant wasteland as the Constitution begins to warp into a monstrous living being. The contents of the ampoule have merged Nancy, Brokk's eye, and the organic components of the ship itself into a voracious living entity, part animal, part vegetable, and part mineral; the transition has driven the new entity insane, and it will consume all life on Earth. The Doctor is unable to fight this new life form, and when Liz and Osgood try to cut it to pieces using the time bridge, the pieces reconstitute on the other side and attack them. They are forced to flee beyond the