Every child knows what a tiger looks like: orange fur with black stripes. But did you know that many animals - including the big cats themselves - perceive tigers as green? PETBOOK editor and ...

Did you know that dogs can't see colors the same way humans do? In fact, dogs can only see two colors and this is how it affects them.

Apes and some monkeys have this style of vision as well. However, most terrestrial mammals like cats, dogs, deer, and horses have dichromatic color vision. Their retinas only contain cones for two ...