Typical heterochromia happens when the white gene prevents pigment from getting into one of the eyes in the womb, while ...

I'm not sure I've ever met a kitten I didn't immediately fall in love with. As soon as I laid eyes on both of my cats (who were each just eight weeks old when I adopted them), it was love at first ...

Gray and green eye colors are the rarest in the U.S., although extremely rare red color can occur with albinism. Eye color is determined by the amount of melanin in the iris, with more melanin making ...

For most of human history, green eyes didn’t exist. Understanding why they do now means rethinking what we know about evolution itself.

Add Yahoo as a preferred source to see more of our stories on Google. I'm not sure I've ever met a kitten I didn't immediately fall in love with. As soon as I laid eyes on both of my cats (who were ...