Ageless is a guide to the biggest issue we all face. Ageing – not cancer, not heart disease – is the world's leading cause of death and suffering. What would the world be like if we could cure it? Living disease-free until the age of 100 is achievable within our lifetimes. In prose that is lucid and full of fascinating facts, Ageless introduces us to the cutting-edge research that is paving the way for this revolution. Computational biologist Andrew Steele explains what occurs biologically as we age, as well as practical ways we can slow down the process. He reveals how understanding the scientific implications of ageing could lead to the greatest discovery in the history of civilisation – one that has the potential to improve billions of lives, save trillions of dollars, and transform the human condition.