A Tibetan mastiff stood its ground as several wolves circled nearby in northern China. Filmed on March 14 in Inner Mongolia, the footage shows the predators moving around the dog during a tense ...

How can a tiny Chihuahua and a massive Tibetan Mastiff come from the same ancestor? From short-legged Dachshunds to lightning-fast Greyhounds, dogs show one of the most extreme examples of diversity ...