Eyes, those fascinating windows to our souls, are also incredibly varied. From a vibrant blue to a warm brown, each shade ...

Figure 2 (left side): The predicted colors of the brown eyes of the ancestral felid. The proportion of the square that each shade takes up indicates the estimated proportion of each color that would ...

This article was updated on June 30th 2021. At one time, brown eyes were the human default, but a chain of mutations has authored varying shades of blue, green and even gray. You’ve likely read poetry ...