Nocturnal geckos have superb vision in dim light - their eyes are 350 times more sensitive to colour at night than a human's (see for yourself with our animal vision interactive). Lacking eyelids, ...

His aim was to discover whether there is any link between eye color and human personality ... came from the researcher's own eyes, which are brown. Let's start with people with dark brown or ...

When evolution skeptics want to attack Darwin's theory, they often point to the human eye. How could something so complex, they argue, have developed through random mutations and natural selection ...

They are far more sensitive to light than cone cells, which is why you can sometimes see stars out of the corner of your eye at night, but when you look straight at them they seem to disappear. 5.

A woman who underwent surgery to change her eye color from brown to blue has revealed how the procedure changed her life. Ulku Dogan, from San Francisco, flew to New York City for the $12,000 ...