One of the mysteries of stem cells is how they proliferate without differentiating. Researchers at the Gladstone Institute (San Francisco) and the University of California-San Diego Medical School believe they have found the answer in a chemical cocktail that they add to cell culturing nutrients.  According to one of those investigators, “it means we can generate stable, renewable neural stem cells or downstream products quickly, in great quantities and in a clinical grade millions in less than a week. . . .”   MORE