Hover, tap, or keyboard-focus any point for its study, assay, organism, cell count, and DOI. Each point is the headline cell/nucleus count reported by that study; “~” marks an approximate or “more-than” figure. Points sharing a year are spread horizontally for legibility.

Notes. Meta-atlases that integrate many prior studies (e.g. the Human Lung Cell Atlas here; and aggregators such as CZ CELLxGENE, >90M cells) are cell counts of assembled corpora, not single sequencing efforts. Whole-brain atlas counts are the droplet scRNA-seq fraction (excluding spatial/MERFISH). Cell counts are author-reported headline figures verified against each paper.