Mother Nature may be vicious but She isn't cruel. When an animal is killed by another, it is done in the quickest most efficient way possible, assuring food for the victor and avoiding needless suffering to the victim. While one's death is supposed to be as personal an event as one's life, occasionally circumstances beyond even Mother Nature's control intervene with the natural path set for an existence and, suddenly, one is faced with a fork in the road. Down one path is the continuance of normalcy; down the other, mutations of the former. Usually Mother Nature is there to help one choose the correct path but She is very busy and cannot be everywhere at once thus, sometimes, the wrong path gets chosen, through no fault of her own. But even She admits She screwed up big time with Peter.