Sclera in lobe-finned fishes, various reptiles, and birds. The ring has disappeared in many groups, including living amphibians, some reptiles and fish, and all mammals. The eyes of all non-human primates are dark with small, barely visible sclera. The collagen of the sclera is continuous with the cornea. From outer to innermost, the four layers of the sclera are: The sclera is opaque due to the irregularity of the Type I collagen fibers, as opposed to the near-uniform thickness and parallel arrangement of the corneal collagen. Moreover, the cornea bears more mucopolysaccharide (a carbohydrate that has among its repeating units a
The Human Factor (2002 The Outer Limits) The Human Factor (2002 The Outer Limits) "The Human Factor" is an episode of the television show "The Outer Limits". It first aired January 11, 2002, in the show's seventh season. This episode is a clip show. Clips appear from the following episodes: "Phobos Rising", "Hearts and Minds", "Manifest Destiny", "Something About Harry", "The Haven", "Final Exam", "Final Appeal", "The Vaccine", and "Replica". Jupiter's moon Ganymede is now the only hope for the human race in 2084 as overpopulation and constant warring has left much of Earth uninhabitable. Space Commander Ellis Ward (Robert Duncan McNeill) must convince android assistant Link