A close-up photograph of what appears to be a light-brown human eyeball shows the organ's expansive, cavernous depths surrounding a seemingly bottomless, black pit that, together, mimics the ...

Regardless of how they look, all human eyes are in fact brown at their core, with the reflection of light determining the color we see in them.

On Wednesday, May 22, the celebrity chef, 82, posted a close-up photo ... brown streak in her blue eyes Unusual?" Stewart wrote in her caption. Never miss a story — sign up for PEOPLE's free ...

In a study published in Science Advances on April 18, a group of five researchers stimulated retina cells in participants' eyes, who, afterwards, claimed to have seen a color no human has seen before.

All blue-eyed individuals living today are necessarily descended from one individual. Such a framing must be weighed against the fact that every single human alive today is likely descended from ...

A study published in Nature Communications reveals the first documented case of blue eyes in a 17,000-year-old newborn from ...

In 2008, a study led by Hans Eiberg from the University of Copenhagen claimed that all blue eyes link back to a single ancestor who lived between 6,000 and 10,000 years ago.

The new color, "olo," is a hyper-saturated version of blue ... the human eye to perceive a color "that never occurs in natural vision," the study read. Getty Never miss a story — sign up for ...