Betterhumans follows up on the recent work that demonstrates mitochondrial damage to be a cause of aging. The article quotes the lead scientist for this impressive piece of research: "It seems to be a universal phenomenon in mammals that you have this damage to mitochondrial DNA as you get older. But I and many others thought this was just a secondary phenomenon. I think the importance of our paper is that we actually show these mutations can indeed cause several changes associated with aging." The significance of this finding is discussed at Fight Aging!, FuturePundit, and the most recent Longevity Meme newsletter.