When you think about it, the human body is one of the most interesting things on this planet. There is no way we can know absolutely everything about it and people are constantly learning new things about it every day. While some of these facts are rather gross and others not really facts at all but silly observations, they will stop and make you think! Dust mites live on our eyelashes? I have to check on that one, and then wash my face repeatedly throughout the day. All your baby teeth are just sitting up there in your skull before they emerge. The photo is pretty creepy: