First of all, what are stem cells? Stem cells are the cells from which every other cell in the body stems. Stem cells divide and create more stem cells, or other, more specific cells, such as brain cells or blood cells. Stem cells have come up a lot in the news in recent years. Science is evolving to show that stem cells are capable of doing a lot of good. They have shown potential to help cure disease, generate new, healthy cells, and test medicines.