If I was sick, Rio would stay by my side, sometimes resting his chin on my knee or nuzzling my ear. We couldn't have asked ...

How is it that the dog, alone among Earth's species, comes in so many shapes and sizes? One way to get a feel for just how diverse dogs have become is to jam your fingers down the throat of a ...

Black-tailed prairie dogs, the best known of the five prairie dog species, live in larger communities called towns, which may contain many hundreds of animals. Typically they cover less than half ...

In fact, the variation among breeds of dogs is far greater than the variation among other completely distinct species in the family Canidae. If dogs evolved from wolves, which seems to be the case ...

From sniffing out rare species to tracking down poachers, dogs aid conservation efforts in a surprising variety of ways. And a growing list of successes shows how our best friends’ legendary ...