Henrietta Lax...not sure of the spelling. She got a tumor. they never seen anything grow like that and so fast. You could put her cells on a table in the sunlight and they would replicate. late 50s or early 60s. interesting to read up on. Like everything i put a cliff note of it in my memory bank. sorry don't remember more and its late to search it up. Its not that they just used one normal baby. its that the cells of that baby and the Black lady Henrietta their cells replicate so easily.