I read that the dog is a direct ancestor of the wolf
I've heard that too, do you know how long ago wolves were domesticated?
Well I did read that dogs were the first species to be domesticated 
That makes sense since they would be useful for hunting!
They have been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes 
Dogs have changed so much from their wolf ancestors!
Their long association with Humans has led dogs to be uniquely attuned to human behavior 
That's very interesting