Researchers at the University of California Riverside found that bed bugs avoid water because it can block their breathing.

Flip a damp log in your backyard, and a crowd of tiny gray roly-polies usually rushes for cover. These pill bugs may look like insects, but they are actually crustaceans, distant relatives of crabs ...

Rather than rely solely on passive diffusion, insects use discontinuous patterns of gas exchange to avoid the toxic effects of oxygen, according to researchers at the University of California, Irvine.