The popular notion that pets see in black and white, notably dogs, is false. People once thought that their furry companions ...

Whereas human eyes contain three types of colour-detecting cells, called cones, dogs have just two ... Geckos, on the other hand, have excellent colour vision at night - a useful advantage for a ...

The black-and-white image shows a hunter surrounded by trees, rocks, and a dog hidden somewhere in the ... The more illusions ...