For decades, biology has been dominated by information - the power of genes. Yet in terms of information there is no difference between a living cell and one that died a moment ago. What really animates cells and sets them apart from non-living matter? This question goes back to the flawed geniuses and heroic origins of modern biology. The answer could turn our picture of life on Earth upside down. In this book, Nick Lane captures a scientific renaissance that is hiding in plain sight. At its core is a cycle of reactions that transforms inorganic molecules into the building blocks of life, and the reverse - the iconic Krebs cycle that sits at the heart of metabolism.