导演:未知  
主演:未知  
类型:剧情片  剧情 
地区:美国 
语言:英语 
日期:2020 
片长:未知
状态:未知
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.