After decades of exhaustive study, scientists have concluded that human tetrachromacy is real. Some people have a truly superhuman range of color vision. In fact, there are two distinct types of ...

About one percent of people worldwide can see 99 million more colors than the average person, creating a more vivid world, ...

"It was a Rosetta Stone moment; I felt like we had broken the code." The recent correspondence from Kristopher Jake Patten, Ph.D., an affable and brilliant scientist studying the senses at Arizona ...

Structures and functions of bird’s eye. (a) Bird vision. (b) Deep central fovea and four types of cones. (c) Foveated vision and tetrachromatic vision. The eyes of raptors such as eagles can ...