sciencehabit writes with news about how the hair mites you carry can be used to determine your ancestry. "Right now, deep in your hair follicles and sweat glands, tiny mites are feeding on dead skin cells, mating, and laying eggs. The microscopic arthropods, known as Demodex folliculorum, live on virtually all mammals—especially their faces—and cause no harm under most circumstances. Now, a new study shows that people of different ancestry carry different subgroups of the bugs, and that the mites' distribution throughout the global population may even reflect how our species has migrated and evolved over the course of history."
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