WATCH: The Way of All Flesh by Adam Curtis

Terrifying and fascinating.

Follows the story of the cells of Henriettta Lacks. She dies in 1951 of cancer, before she died cells were removed from her body and cultivated in a laboratory in the hope that they could help find a cure for cancer. The cells (known as the HeLa line) have been growing ever since, and the scientists found that they were growing in ways they could not control.