Biocomplexity is the study of complex structures and behaviors that arise from nonlinear interactions of active biological agents, which may range in scale from molecules to cells to organisms. Almost every biological system exhibits complexity - emergent properties where the ensemble possesses capabilities that its individual agents lack. Classical examples of biocomplexity include the behavior of molecular motors during DNA transcription, genetic and metabolic networks within cells, the interacting filaments of the cytoskeleton, which allow the cell to move, the differentiation, organization and movement of cells during embryonic development, the function of the networks of neurons which compose the brain and the schooling of fish or birds.