Most people are familiar with dust mites.
After all, they cause allergies in people and can cause mange in animals.
But according to Business Insider, microscopic face mites live on pretty much everyone's face, too.
However, most people never notice, because face mites feed on facial oil, not flesh.
And when it comes time to breed, females lay just a single egg in your pores.
Even better, researchers can study your face mites to track how your ancestors migrated across the planet.
That's because we usually pass them from parent to child, so the mites stay in the family!