A scientist scraped a black dot on his forehead and put it under a microscope. He saw dozens of tiny face mites, aka Demodex mites, crawling around on the plate. Demodex are harmless and like to live ...

Add Yahoo as a preferred source to see more of our stories on Google. As you fall asleep each night, you can take comfort in knowing you are never truly alone — thanks to the dozens of eight-legged ...