Biocomplexity is about pervasive interaction, adaptation, and co-evolution of the living, technological, and natural worlds. Life, its artifacts, and the natural and built environments make up a complex system of astronomical numbers of possible interactions and relationships. The result is the world we inhabit, the technologies we produce and use, and the co-evolution of these things. Science struggles with the integration of all of this, but the practical reality is that management of ourselves and the systems on this planet is undeniably critical.