For some reason, cats have some of the most mesmerizing eyes in the entire world. They're so big, often very wide, and ...

Now scientists have harnessed the Internet’s abundant wild cat photographs to chart the transition from brown eyes to colors such as green and blue—and ... makes brown-black, and pheomelanin ...

SEE ALSO: A black cat invading a rugby ... it was Bowie's mismatched eyes that has attracted curiosity. She has a brown eye on the left, while her right eye is a bright blue, all due to a rare ...