Bullied for having a cleft lip and palate and heterochromia iridium (different colored eyes), one boy gained confidence with help from a very special cat.

The science gets complicated, but having that silky milk chocolate coloring like Scrat means he has a black-dominant gene ...

Another cat with heterochromia caught the internet's attention last month. A Sphynx cat named Akasha is, according to her owner Michelle Morris, rather outspoken.

Imagine seeing someone with odd-colored eyes: blue on one side, brown on the other. Mesmerizing, isn't it? This phenomenon has a name: heterochromia. If you've ever heard of this particular ...

Heterochromia is pretty rare in humans, thought to affect fewer than 200,000 people in the US. However, if it wasn’t already obvious from our choice of header image, humans aren’t the only ...