Frogs that freeze solid, worms that dry out, and bacteria that survive temperatures over 100°C are all organisms that have an extreme biology, which involves many aspects of their physiology, ecology, and evolution. These organisms live in seemingly impossible places and exhibit fascinating behavior. In this captivating account, the reader is taken on a tour of extreme environments, and shown the remarkable abilities of organisms to survive a range of extreme conditions, such as high and low temperatures and desiccation. Examples include: