After tackling such topics as the fate of cadavers (Stiff), the existence of ghosts (Spook), and sex in scientific research (Bonk), Mary Roach settles her gaze on the not-so-glamorous lives of astronauts, their training, and the quirky experiments performed in the name of space science. Roach's research sends her into the archives and into zero-gee flight in order to find answers to such questions as what happens when an astronaut vomits in his/her helmet, and whether or not it is feasible, or even possible, to have sex in a gravity-free environment. As informative as it is funny, this book will appeal to space enthusiasts, trivia whizzes, and anyone out for a good laugh.