The world’s largest and most thorough map of healthy breast tissue has been developed by a recent study, which offers eminent knowledge of mammary biology and may aid in the identification of therapeutic targets for conditions like breast cancer. More than 714, 000 cells from 126 women were profiled by the Human Breast Cell Atlas using single-cell and spatial genomic techniques. The breast atlas identifies differences based on ethnicity, age, and menopause status in healthy women and highlights 12 major cell types and 58 biological cell states.