P rimates are a group of mammals that includes humans and our close relatives, such as apes, monkeys and lemurs. Monkeys, such as capuchins and macaques; prosimians, like lemurs a ...

Walking through a darkened forest in southeastern India, hikers swept their flashlights across the branches looking for a “characteristic orange-red eye shine.” They eventually spotted it perched in ...

Kirk, E. C. Effects of activity pattern on eye size and orbital aperture size in primates. Journal of Human Evolution 51, 159-170 (2006). Koyabu, D. B. & Endo, H. Craniodental mechanics and diet ...

Finally, in our primate ancestors, the eyes moved to the front of the skull. This resulted in better depth perception, a critical capability in animals who spend their lives leaping among branches.

And if you peer into the trees, you may just spot an elusive primate called the ochi. ISAIAH SAXON: Ochi is simply the word they use for eyes, which is all they ever see of them when they shine ...