A new optical illusion excellently illustrates just how finicky our eyes are when it comes to perceiving colors.

Pupil size in people with synesthesia changed depending on how bright or dark the perceived colors were.

What does red look like to you? Philosophers have argued about this for centuries. Maybe my red is your green. Maybe we live ...

The colors we see may get increasingly dull as we get older, scientists have found. The pupils of younger people's eyes react differently to bright colors than those of older folk, a new paper in the ...

* Purple is a non-spectral color created by the brain from red and blue signals * Individual differences in eyes and brain make each person see colors uniquely * All colors we //perceive, including ...

This video lets you peek inside the human brain, highlighting the neuronal fibers that enable communication across the brain. This communication is vital to all brain functions, including learning, ...