Two summers ago, scientists removed a tiny piece of flesh from Philip Ball’s arm and turned it into a rudimentary “mini-brain.” The skin cells, removed from his body, did not die but were instead transformed into nerve cells that independently arranged themselves into a dense network and communicated with each other, exchanging the raw signals of thought. This was life—but whose? 

In his most mind-bending book yet, Ball makes that disconcerting question the focus of a tour through what scientists can now do in cell biology and tissue culture. He shows how these technologies could lead to tailor-made replacement organs for when ours fail, to new medical advances for repairing damage and assisting conception, and to new ways of “growing a human.” For example, it might prove possible to turn skin cells not into neurons but into eggs and sperm, or even to turn oneself into the constituent cells of embryos. Such methods would also create new options for gene editing, with all the attendant moral dilemmas. Ball argues that such advances can therefore never be about “just the science,” because they come already surrounded by a host of social narratives, preconceptions, and prejudices. But beyond even that, these developments raise questions about identity and self, birth and death, and force us to ask how mutable the human body really is—and what forms it might take in years to come. 
 

In the final years of the twentieth century, émigrés from engineering and computer science devoted themselves to biology and resolved that if the aim of biology is to understand life, then making life would yield better theories than experimentation. Armed with the latest biotechnology techniques, these scientists treated biological media as elements for design and manufacture: viruses named for computers, bacterial genomes encoding passages from James Joyce, chimeric yeast buckling under the metabolic strain of genes harvested from wormwood, petunias, and microbes from Icelandic thermal pools.
 
In Synthetic: How Life Got Made, cultural anthropologist Sophia Roosth reveals how synthetic biologists make new living things in order to understand better how life works. The first book-length ethnographic study of this discipline, Synthetic documents the social, cultural, rhetorical, economic, and imaginative transformations biology has undergone in the post-genomic age. Roosth traces this new science from its origins at MIT to start-ups, laboratories, conferences, and hackers’ garages across the United States—even to contemporary efforts to resurrect extinct species. Her careful research reveals that rather than opening up a limitless new field, these biologists’ own experimental tactics circularly determine the biological features, theories, and limits they fasten upon. Exploring the life sciences emblematic of our time, Synthetic tells the origin story of the astonishing claim that biological making fosters biological knowing.