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,
His Eye Is on the Sparrow soundtrack although admitting "Houston sounds as commanding as one can expect from a later recording." "Entertainment Weekly" editor Melissa Maerz called it "a gorgeously rippling solo" with Houston "testif[ying ...] that Jesus is watching over her." Jody Rosen of "Rolling Stone" panned the cover, saying "Houston sings – and croaks – in a voice octaves lower than in her prime. At times the song has a ravaged magnificence, but mostly it's painful." There are many arrangements of the hymn that have been produced since its original publication. These include: His Eye Is on the Sparrow "His Eye Is on the