Seeing through one eye or many, in technicolour or black and white, few animals experience the world as we ... Whereas human eyes contain three types of colour-detecting cells, called cones, dogs have ...

After 2 years and a half, the dog was completely transformed from black to white, with many sharing nicknames for him, including 'Buster the Gray' and 'Buster the White.' Buster, the dog who ...