Everything is metamorphosis and we experience this from birth, because being born means inheriting a life that has already lived - its DNA, its breath, its flesh, its atoms - and striving to give it another face. This is what happens to all species through evolution: each is the metamorphosis of a form that has already lived and that is prolonged in the diversity of the other. This continuity binds all living things to each other and to the Earth, the immense caterpillar from which the butterflies of the species are released at every moment. One of the best-known and internationally esteemed Italian philosophers, Emanuele Coccia has turned this brilliant and original book, already translated into several languages, into a metamorphosis of the most diverse knowledge: from zoology to philosophy, from biology to linguistics, from botany to literature. The result is a vision in which the human being himself is a walking zoo, the fruit and expression of a larger and more interconnected form of life.