From chihuahuas to great Danes, dogs differ more in size than any other mammal species on the planet. A mutation behind such variation has been traced to an unexpected source: ancient wolves. The ...

Ask any pet parent about their pup’s longevity and they’ll likely tell you they wish dogs could live forever. And while an anti-aging drug for canines is in the works, dog owners still have to grapple ...

National Institutes of Health researchers have shown that areas of the genome related to brain development harbor variants that may account for behavioral differences among different dog lineages. The ...

Explore the fascinating ways dog breeds continue to evolve through genetic influences. The fluffy Afghan Hound and the sleek Greyhound may seem worlds apart. Yet, their coat length is determined by ...

TUCSON, Ariz. (KVOA) - University of Arizona researchers are launching a new study to investigate why large dogs die younger than small dogs, but their brains appear to age at the same rate. Evan ...

The gray wolf, also called the timber wolf, is the largest member of the canine family with fur ranging from gray to brown, black or white. Smithsonian's National Zoo and Conservation Biology ...