The important thing to recall here is that BioTime is the current home of Michael West, who is a superbly skilled publicist. In terms of the science, this isn'

The important thing to recall here is that BioTime is the current home of Michael West, who is a superbly skilled publicist. In terms of the science, this isn't by any stretch of the imagination a reversal of aging in cells. It is what it is, which is generating useful cells with longer telomeres - if you want to define age as the length of telomeres, then sure, let's say you've reversed aging. But that isn't a useful definition. The question of how telomeres fit into the bigger picture of aging is still very much debated. Their average length in some tissues decreases with age, but that might be a secondary result of other processes such as accumulated mitochondrial DNA damage. Lengthening telomeres with telomerase in conjunction with cancer suppression genetic engineering has increased mouse life span by 50% - but here again there is the possibility that the telomerase isn't extending life by extending telomeres, but by doing something else. Biology is complicated.