This view of the cell as a contingent, constructional entity challenges our traditional idea of what a body is, and what it can be. It also opens up some remarkable and even disconcerting possibilities about the prospects of redirecting biology into new shapes and structures. Life suddenly seems more plastic and amenable to being reconfigured by design.
Understanding the contingency and malleability of multicellular form also connects us to our deep evolutionary past, when single-celled organisms first discovered the potential benefits of becoming multicellular. ‘The cell may be the focus of evolution, more than genes or even than the organism,’ says Iñaki Ruiz-Trillo of the Institute of Evolutionary Biology in Barcelona. Far from the pinnacle of the tree of life, humans become just one of the many things our cells are capable of doing.