Scanning electron microscope image of hairs on a honeybee’s eye. Image © Georgia Tech, CC BY

Last week a pair of scientists writing for The Conversation (a news source with what they call “academic rigor, journalistic flair”) and also Discover Magazine’s science blog discussed the merits of hair in keeping animals clean. We found it pretty interesting, and hope you will too:

Watch a fly land on the kitchen table, and the first thing it does is clean itself, very, very carefully. Although we can’t see it, the animal’s surface is covered with dust, pollen and even insidious mites that could burrow into its body if not removed.

Staying clean can be a matter of life and death. All animals, including us human beings, take cleaning just as seriously. Each year, we spend an entire day bathing, and another two weeks cleaning our houses. Cleaning may be as fundamental to life as eating, breathing and mating.

Yet somehow, cleaning has gotten little attention.

In our new review article in the Journal of Experimental Biology, we discuss how cleaning happens in nature and whether animals indeed have principles for getting clean. We looked at microscope images to count the number and sizes of hairs across hundreds of animals. We read nearly a hundred articles on cleaning in nature, trying to put numbers onto the cleaning process.

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