
What walks on four legs, runs in a 1,150-mile race, detects bombs, tracks bad guys, and still enjoys an afternoon of chasing Frisbees? It's Canis familiaris, otherwise known as the dog. Whether a mutt or purebred, the domesticated dog has been a part of human society for thousands...

What walks on four legs, runs in a 1,150-mile race, detects bombs, tracks bad guys, and still enjoys an afternoon of chasing Frisbees? It's Canis familiaris, otherwise known as the dog. Whether a mutt or purebred, the domesticated dog has been a part of human society for thousands...
