What does "reddish green" look like? Not brown, not olive - an actual color that's simultaneously red and green the way cyan is simultaneously blue and green. You can't picture it. Neither can I.

TL;DR: Researchers have discovered a color called "olo," unseen by humans before, by stimulating specific M cones in the retina. This breakthrough bypasses natural RGB limitations, revealing a unique ...

One of the enduring commonalities across most human societies is the belief that our eyes are a window into the immutable truth of the universe. Eyewitnesses are accorded special status in trials, ...