 We talk about the fact that we all have stem cells in every organ or tissue, and it's true, we do. But one thing that very few people talk about is the fact that, and one of the things that we're working on is the fact that as we age, we lose some of our stem cells. So I actually believe that aging is a failure of stem cells. What do I mean by that? What I mean is that as we get older, not only do the number of cells that we have that can repair our body go down, but the function, the ability of the ones we have goes down as well. You know when you're two and you fall down and you scrape your knee, you heal and you don't have a scar for the rest of your life. When you're 62 and you fall down and you scrape your knee, you're probably going to have a scar. And that's because as we age, we lose stem cells, cells that our body uses to repair every organ or tissue. The cool thing is, and not many people are looking at this, is there's a difference in how that happens in men and women. So one of the things that I'm thrilled about is the chance to work with Stephanie Coulter at the Women's Heart Health Program here, along with the colleagues I'm already working with around the country, to begin to define the differences in how men and women repair their bodies, how our stem cells work and how they differ in men and women. You know, we know women rock, now we've got the data to prove it.