Cells

In the 19th century, biologists established that all living organisms—from animals and plants to algae and fungi—are composed of cells. Around the same time, Charles Darwin introduced his theory of evolution, proposing that all life on Earth shares a common origin. Today, the scientific community has defined that origin as LUCA: the last universal common ancestor.This is the story of how LUCA—the ancestral cell—emerged billions of years ago and gave rise to the vast diversity of life-forms we see today. Blending art with science, biologist Christian Sardet explores the tiny structures and life-giving functions of DNA, RNA, and proteins; examines the mysteries of reproduction, aging, and death; and offers a novel answer to the immortal question, “What is life?”Life is a social network of cells.