We are all fascinated by the mystery of metamorphosis - of the caterpillar that transforms itself into a butterfly. Their bodies have almost nothing in common. They don't share the same world: one crawls on the ground and the other flutters its wings in the air. And yet they are one and the same life. Emanuele Coccia argues that metamorphosis - the phenomenon that allows the same life to subsist in disparate bodies - is the relationship...