Animals with blue eyes are a rare occurrence in nature due to being linked to recessive genetics, mutations, and specific ...

Black cats with green eyes have long been shrouded in mysticism and superstition. Their inky midnight fur and enchanting ...

The blue eyes of some seabirds appear to turn black ... Gannets with black or mottled black irises, rather than the standard pale blue colour, have been spotted for the first time in several ...

Specialized cells in a baby’s eyes, called melanocytes, produce a protein called melanin—which darkens the skin, but also darkens our irises, the colored part of the eye. According to the ...

For those who produce absolutely no melanin, light reflecting off their eyes' blood vessels makes their irises appear red ... has been traced back to 2005. Black eyes: Black eyes technically ...