San San the three coloured eye cat from China. (Image: X/@Dailymeoww1) San San, a cat from China, has rare sectoral heterochromia. The cat's eyes have three different colors, making him unique. This ...

Melissa Breyer was Treehugger’s senior editorial director before moving to Martha Stewart. Her writing and photography have been featured in The New York Times, The Guardian, National Geographic, ...

The most common reason for heterochromia is having a cat with a solid white coat. This trait comes from the presence of a white gene, either the white coat gene or a white spotting gene. The white ...