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 ...

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 ...

Dogs have a special chemistry with humans that goes back many tens of thousands of years. Researchers investigated this special evolutionary relationship from a number of different angles. Their ...