Every human body carries a secret cargo: a huge population of micro-organisms that lives in your mouth and nose, on your skin, in your guts. This is the human microbiome, and it has recently become biologists' most thrilling research interest.
Vastly outnumbering human cells, our invisible passengers are vital to life. They help us digest food, make essential nutrients, and combat disease. They may even have a role in developing behavior. We are not just isolated humans, but superorganisms.
Acclaimed science communicator and editor Jon Turney presents the first book-length account of a new realm of human biology.