Whenever I met a collared lemming on a summer day and took its stare I would think: Here is a tough animal. Here is a valuable life. In a heedless moment, years from now, will I remember more machinery here than mind? If it could tell me of its will to survive, would I think of biochemistry, or would I think of the analogous human desire? If it could speak of the time since the retreat of the ice, would I have the patience to listen?