We know how important faces can be in capturing people’s attention, and how powerful facial expression can be in social interaction, but do you know this also applies to dogs? Researchers have found that dogs have evolved muscles around their eyes, enabling them to mimic an “infant-like” expression that could manipulate human feelings. Such “puppy eyes” helped domesticated dogs to bond with humans.
“Humans would have an unconscious preference to protect and breed from dogs with such an appealing trait, giving them an evolutionary advantage and reinforcing this change in subsequent generations,” says Dr. Juliane Kaminski, the coauthor of this study. "The evidence is compelling that dogs developed a muscle to raise the inner eyebrow after they were domesticated from wolves," says Dr Kaminski.
「由於狗這樣的特質，使人類有一種無意識的偏好想要保護、協助繁殖狗狗，這樣的偏好讓狗有演化上的優勢，替某些品種帶來進化優勢。」這份研究的共同作者Dr. Juliane Kaminski這麼解釋。「有證據顯示，狗從狼群中馴化之後，發展出一塊肌肉來抬高眉毛。」研究作者這麼說。