Forget cerulean — a bright, clear sky is actually dominated by ultraviolet light. Humans can’t see ultraviolet light, but many birds can. “Their sky will be essentially an ultraviolet sky,” said Daniel Hanley, a sensory ecologist at George Mason University.
Birds have gotten more attention in our pages than any other person, place or thing since we first started. Today that attention is focused on their sight:
A Bird’s-Eye View of a Technicolor World
Scientists have devised a new video system that reveals how animals see color, and us.
Is the sky truly blue?
Organikos 