All mammals have basically the same set of genes, yet there are obviously some significant differences that distinguish the various species. Recent research suggests that one such difference involves ...

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 ...

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 ...

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 ...

While the range of physical diversity dogs show is often thought to be the result of intense breeding over the last 200 years, a new study – based on tracing 50,000 years of canid skull evolution – ...

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 ...