Most humans see the world through three types of light-sensitive cells in the retina, called cones. These detect red, green, and blue light, allowing us to distinguish roughly one million to 10 ...

The average human eye can see as many as 10 million variations in color, according to some estimates, from purest gray to laser green. Now scientists say they’ve broken out of that familiar ...

Our cultural diversity is unparalleled. Open-endedness, as a unique human quality, is not just about variety; it reflects the quantum leaps by which our cultures can evolve.