With the weather warming, it's the season for spring cleaning. But before you reach for the broom and mop, consider who else is sharing your home. The variety of uninvited guests in your dustpan may surprise you.
A recent study published in the journal PeerJ took up the challenge of cataloging the large numbers of tiny animals — arthropods — that live in modern human dwellings. In 50 houses in and around Raleigh, N. C., the research team found about a hundred different species of arthropods in each home. The tally included familiar types — like flies, spiders and ants — but also some species that are less well known, such as gall wasps and book lice.