This is a science biography like the world has never seen. What if one of the great American women of modern science and medicine–whose contribution underlay historic discoveries in genetics, the treatment and prevention of disease, reproduction, and the unraveling of the human genome–was a self-effacing African-American tobacco farmer from the Deep South? A devoted mother of five who was escorted briskly to the Jim Crow section of Johns Hopkins for her cancer treatments? What if the untold millions of scientists, doctors, and patients enriched and healed by her gift never, to this day, knew her name? What if her contribution was made without her knowledge or permission? Ladies and gentlemen, meet Henrietta Lacks. Chances are, at the level of your DNA, your inoculations, your physical health and microscopic well-being, you’ve already been introduced.