In a very real sense, the body is already there—not as matter, but as information waiting to become visible.… The lecture hall at the newly expanded campus of European Molecular Biology Laboratory was unusually crowded. Most of the audience expected a discussion about the latest advances in developmental biology: single-cell RNA sequencing, spatial transcriptomics, AI-assisted protein prediction, and synthetic embryo models. Instead, Professor Elena Weiss projected a single image onto the screen. A fertilized human egg. “Everyone here,” she began, “has been taught a simple story.” The screen changed. The familiar textbook diagram appeared: one cell, two cells, four cells, eight cells, a blastocyst, an embryo, a fetus. “One cell divides. Cells differentiate. Organs emerge.” The audience nodded. “Now tell me,” she said, “at what exact moment does the future heart first exist?” Nobody answered. A doctoral student raised a hand. “When cardiac progenitor cell...