Alive

Being alive is the singular transformation of matter into body - a body that sustains itself through ceaseless work. But a living body does more than just persist. Life-forms act intelligently for reasons grounded in their own needs and qualities. They are active makers of meaning in dialogue with a world made significant by their presence.

What does it mean to be alive? The slow contortion of a plant toward light, the spear-flight of a hawk toward their quarry - these are purposeful actions. But where does that purpose come from, and what does it tell us about who we are?

In Alive, natural philosopher Melanie Challenger takes us through the latest discoveries in biology and physics to reveal a radical truth: to be alive is first and foremost a way of being a body. From Greenland sharks that can live for half a millennium, to birds that sense the Earth's magnetic field through their retinas, and even slime moulds that solve mazes, this book tells a new story of intelligence in the living world.

A scientifically grounded challenge to the idea that life is either a machine run by genes or an essence separable from the body, Alive restores agency, purpose and meaning to organisms in an age of artificial intelligence and biodiversity loss. By recognising that our bodies are both how and why we are alive, the book asks what it would mean to live - and to act - with that knowledge.