In recent decades scientists have discovered life in places where no one imagined it was possible. Single-celled algae in Antarctic ice floes, unique fungi in cooling pools of nuclear reactors, bacteria in volcanic vents on the ocean floor, all became classified as "extremophiles", new forms of life that love the extremes. Scientists have hypothesized that there may be even stranger forms of life, possibly based in silicon instead of carbon, or some that use ammonia as we do water. this book explores the possibilities of radically different forms of life and how these theories open up the newest frontiers in biological science and new exploration.(This book may contain a sharpie mark on the top or bottom edge and may show mild signs of shelfwear.)