Cockroaches are constantly grooming themselves, says entomologist Coby Schal
, of North Carolina State University. To clean its antenna, a cockroach will grab ahold of it with its front leg, bring the antenna to its mouth, and run the antenna from base to tip through its mandibles like a piece of floss. Publishing in the Proceedings of the National Academy of Sciences
, Schal and colleagues investigate the benefits of clean antennae.