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 Sibyl The Eye of the Sibyl "The Eye of the Sibyl" is a science fiction short story by American writer Philip K. Dick. It was written sometime around 1975, but not published until 1987 when it was included in volume 5 (subtitled "The Little Black Box") of "The Collected Stories of Philip K. Dick", and has been reprinted since in other editions of this book such as the U.S. edition "The Eye of the Sibyl and Other Stories" . This is said to have been Dick's first piece of fiction for publication after his "2-3-74" experience that was the basis for