They were one of the first groups of creatures to develop complex, compound eyes, where many individual lenses focus light onto groups of photoreceptor cells. This group of hard-shelled prehistoric ...

For complex structures like the eye, palaeontologists want to see in 3D. In the Australian fossils, minerals replicated the surface structure of the eyes before the lens details were lost to decay.

Some see only in black and white ... Tom Cronin peers into an aquarium tank, and two googly compound eyes, like muffins mounted on stalks, peer back. "Mr. Googles," as Cronin affectionately ...

The eyes of a Cuban rock iguana, a gargoyle gecko, a blue-eyed black lemur, a southern ground hornbill, a red-eyed tree frog, a domestic goat, a western lowland gorilla, and a human This story ...