Recoloring the Dreamworld

"Here’s one possible explanation of all this: A ubiquity of black and white images in film media changes people’s dreams. Although Aristotle, Epicurus, Freud, and their contemporaries dreamed in color, the average American in 1950 dreamed mostly in black and white. And now that color media again dominate, our dreams are returning to color."

(He comes to a different conclusion, by the way.)