When evolution skeptics want to attack Darwin's theory, they often point to the human eye ... The first animals with anything resembling an eye lived about 550 million years ago.

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to ... absorbed on this return trip passes out of the eye the same way it came in—through the pupil.

Scientists have identified never-before-seen cells in the human eye that could potentially help ... complexities of human organs than traditional animal models do. An analysis of the cells within ...

The book begins with a 53-page prolog called "A brief history of eyes", which describes the optical systems of at least ten different animals in ... formation of the human eye," focuses on overall ...

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.