摘要:Medieval alchemists, craving the boon of youth and desiring renewed health and strength, were kept busy searching for the mythical elixir of life, a universal medicine supposedly containing a recipe for rejuvenescence. Now, in the 21st century, their modern successors use the fruits of the genomics revolution to discover genetic factors that ward off aging and aging-related diseases. In this issue of Aging, Gravina et al. [1] present evidence that the long life span of the more fortunate among us could be related to variants of the p21 cell cycle inhibitor.