狗的故事

Dogs have long been dependable companions by our sides. But it wasn’t always that way, and a look at their closest living relative, the wolf, makes it clear why. Research into dog domestication and intelligence offers clues into the human-dog relationship. And analyzing dogs’ brain activity and genes may even help answer whether dogs are in it for the food—or if they really love us. 最新最经典好看的影视剧-可搜影视为您提供狗的故事在线观看，更多影视请访问www.keso.org