From the long term perspective, the most basic stem cell research taking place at the moment is also the most important: "We want to learn more about stem cells over the lifetime of a human and why they seem to quit working as we age. Is it because the stem cells are becoming depleted. Is it because stem cells are dying out and not being replaced? Is it because you have other hormones being produced that interfere with the action of stem cells?" The range and effectiveness of potential regenerative therapies will expand as we learn more about stem cells - how to control them and how they actually work. With that in mind, it's good to see that research programs are underway.