According to newly-published research, dogs have perfected the eye brow raise by using facial muscles that are stronger than their cousins, the wolves. Over thousands of years of dog domestication, people preferred pups that could pull off that sad sack, take-care-of-me look. And that, in turn, encouraged the development of the facial muscle that creates it. "The researchers believe dogs, over their relatively short 33,000 years of domestication, used … [Read more...]