Dogs do not see the world in black and white: they see much as a red-green colourblind person does, in blues and yellows — reds and greens simply fade to murky browns and grey, but colour is very much there

Dogs do not see the world in black and white: they see much as a red-green colourblind person does, in blues and yellows — reds and greens simply fade to murky browns and grey, but colour is very much there

Dogs do not see only in black and white. That is one of the most stubborn myths in popular biology, and it is wrong. Dogs see colour. Their world is narrower than ours, leaning toward blues and yellows, with reds and greens washing out into dull browns and greys. But colour is there, and scientists have mapped the parts of the eye that produce it. Where the black-and-white myth came from The idea did not appear from nowhere. For decades people a…