Today, we are living through a revolution in biology. Giant strides are being made in understanding why we age—and why some species live longer than others. Could we eventually cheat disease and death and live for a very long time, possibly many times our current lifespan? Venki Ramakrishnan, recipient of the Nobel Prize in Chemistry and former president of the Royal Society, takes us on a riveting journey to the frontiers of biology, asking whether we must be mortal. Covering the recent breakthroughs in scientific research, he examines the cutting edge of efforts to extend lifespan by altering our genetic makeup. But might death serve a necessary biological purpose? What are the social and ethical costs of attempting to live forever? This book is a narrative of uncommon insight and beauty from one of our leading public intellectuals.