Greenlandic sled dogs, also known as Qimmit, play while resting. Markus Trienke via Wikimedia Commons under CC-BY-SA-2.0 Man’s best friend has been our faithful companion for thousands of years.

Many dog breeds are noted for their personalities and behavioral traits, from the distinctive vocalizations of huskies to the herding of border collies. People have worked to identify the genes ...

The pug’s flat face and tight, corkscrew tail didn’t appear by accident; we engineered them. That “baby-faced” muzzle crushes airway space, making heat regulation and simple breathing a struggle.

While dogs and cats are genetically unrelated, breeding for certain features is making some dog and cat breeds look more and ...