“Most allergies in dogs are to the environment around them – pollen, dust mites, and even human dander.” She noted that studies have suggested there might be a link between gut bacteria and ...

The mites are unable to complete their life cycle on humans, but they can cause people ... are in a less than ideal state,” agreed DeTar. “Dogs are always going to be an issue, because the ...

And by comparing their DNA, scientists can trace how different groups of humans migrated across the world. For example, a study found that European mites genetically diverged from East Asian mites ...

This story appears in the February 2015 issue of National Geographic magazine. Currently two species of face mites are known; at least one of them appear to be present on all adult humans.