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.狗的故事无弹窗在线观看地址来源于互联网，西钰影院免费提供剧情片《狗的故事》全集高清完整版在线观看服务。