These microscopic mites live on your face
You almost certainly have animals living on your face. You can't see them, but they're there. They are microscopic mites, eight-legged creatures rather like spiders. Almost every human being has them. They spend their entire lives on our faces, where they eat, mate and finally die. Before you start buying extra-strong facewash, you should know that these microscopic lodgers probably aren't a serious problem. They may well be almost entirely harmless. What's more, because they are so common they could help reveal our history in unparalleled detail.