Book excerpt: With the wit of Bill Bryson and the spirit of Natalie Angier, Idan Ben- Barak takes us on a fantastic voyage into the infinitesimal world of microbiology. In The Invisible Kingdom, he introduces us to the amazing lives and workings of genes, proteins, bacteria, and viruses, and the ways in which they interact to shape life on Earth. Exploring everything from radioactive waste and insect sex-change operations to the inner workings of antibiotics, Ben-Barak reveals how important these tiny critters are to all of us. He brings this largely unseen world to life with refreshing analogies and metaphors: cells "pop like bubbles" and bacteria "dream of rain." On the journey, we learn about the teamwork required to rot human teeth, the origins of diseases, what really goes on inside cow stomachs, and the ways in which microbes benefit human life. An infectious and informative scientific exploration, The Invisible Kingdom will change the way we see the world around us.