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 ...

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 ...