“HeLa cells were one of the most important things that happened to medicine in the last hundred years,” Defler said. Then, matter-of-factly, almost as an afterthought, he said, “She was a black woman.” He erased her name in one fast swipe and blew the chalk from his hands. Class was over.”

“HeLa cells were one of the most important things that happened to medicine in the last hundred years,” Defler said. Then, matter-of-factly, almost as an afterthought, he said, “She was a black woman.” He erased her name in one fast swipe and blew the chalk from his hands. Class was over.”

— Rebecca Skloot