Psychedelic Dinosaurs, Four-Dimensional Hummingbirds, and How We Got Our Vision: Color, Consciousness, and the Dazzling Universe of Tetrachromacy

Without color, life would be a mistake. I mean this both existentially and evolutionarily: Color is not only our primary sensorium of beauty — that aesthetic rapture without which life would be a desert of the soul — but color is how we came to exist in the first place.

from Pocket