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 Tandyla Tartessian Empire with the island continent of Pusad and the actual Atlantis, a barbaric mountainous region that is today the Atlas mountain range. The Eye of Tandyla "The Eye of Tandyla" is a fantasy story by American writer L. Sprague de Camp, part of his Pusadian series. It was first published in the magazine "Fantastic Adventures" for May, 1951, and first appeared in book form in de Camp's collection "The Tritonian Ring and Other Pusadian Tales" (Twayne, 1953). The story has also appeared in the magazine "Fantastic" for November 1965, the anthologies "Time Untamed" (1967), "The Magic of Atlantis" (1970),