Explore the growing set of cutting-edge scientific packages developed as major outcomes of the BRAIN Initiative's Cell Census (BICCN) and Cell Atlas Networks (BICAN).  These consortia represent successive phases of a decade-long mission to map the diversity of brain cell types across species. BICCN (2017–2022) established foundational reference atlases and open data resources that defined the field, while BICAN (2022–present) builds on that foundation to produce large-scale, multimodal human and nonhuman primate cell atlases with integrated analysis and harmonized data standards. Discover how these powerful datasets are revolutionizing our understanding of the brain and its cell types