HeLa Cells — The Immortal Cell Line

HeLa cells are the immortal foundation of modern medicine—in 1951, doctors at Johns Hopkins took cervical cancer cells from Henrietta Lacks, a Black woman in Baltimore, without her knowledge or consent. Those cells, labeled HeLa, became the first immortal human cell line: they divide indefinitely in a lab and are still alive today, with over 50 million metric tons of biomass grown since 1952. Lacks' family didn't know her cells existed until 1975 and received no compensation for decades. The science is miraculous; the ethics are a stain.