How dogs see the world is based on the structure of their eyes. Dogs are dichromats, meaning they only have two color-processing cones, while humans have three. Dogs can see colors, including yellows ...

The wild canines that our pet dogs evolved from are "crepuscular," meaning they are usually active at dusk and dawn. This means that they needed eyes that worked well in dim light, which means that ...

It's no wonder these pups are man's best friends!