Personally I think its only right for nature to want to get rid of the dominating population on the earth. I mean it looks as though, mother nature is taking a lot of shots at us.
I mean think about it. Nature creates this highly adaptable, very smart creature; and that creature begins to kill the earth. So naturally, Nature will try to kill its failed experiment. Nature's weapon: The Earth.
Nature tried to make one dominent population, the Dinosaurs. Their specialty for domination, ferocity. That didn't work, so kill them off. Then Nature tries, another Human, their specialty, intelligance. Obviously not working.