Grains of uncooked rice dwarf this book louse. Though book lice thrive in most human homes, they largely go unnoticed. Josh Cassidy/KQED hide caption toggle caption Josh Cassidy/KQED Shots - Health News Meet The Tiny Critters Thriving In Your Carpet, Kitchen And Bed KQED Public Media May 11, 2016 Dust mites, gall wasps and book lice don't bite, but they might make you wheeze. Scientists found about 100 types of arthropods wiggling or munching skin flakes in typical homes. Take a look.