1.   Even if medical science were to find cures for all diseases and all injuries, he says, people would die of cellular aging.

2.   Fourth, it is not clear that telomere shortening is the fundamental cause of cellular aging.

3.   Rather than waiting for a product approval, Geron also hopes to begin generating revenues soon by selling its expertise in cellular aging to drugmakers.

4.   Yet the calves seem more youthful than normal as judged by various measures of cellular aging, and their telomeres are longer than the usual.