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,
Guild Wars: Eye of the North 40 new armor sets, and 10 new "heroes", in addition to the new items, weapons, and titles added as usual in every "Guild Wars" campaign. It is in part intended to act as a bridge from "Guild Wars" to "Guild Wars 2" and introduces the new races of the "Norn" (dwellers on the icy slopes of the Shiverpeak Mountains to the north) and "Asura" (inhabitants of the southern part of the Maguuma Jungle), both of which would later become playable in the sequel. "Eye of the North" continues the "Prophecies" story, which is told in three acts. In Act I,