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 ...

Scanning electron microscope image of a two-spotted spider mite, which is less than one millimeter long. Richard Clark of the University of Utah helped lead an international team of 55 scientists who ...