"What challenges does aging pose to individuals and society at large? What causes aging at the cellular and molecular level? What if we could trick stem cells into thinking they were young again? If so, could we leverage stem cells to help live longer, healthier lives? These are just some of the fascinating questions researchers are exploring in today's closer look at the aging process. Robert A.J. Signer, Ph.D., and Shiri Gur-Cohen, Ph.D., examine aging at the molecular and cellular level to show how stem cells may be the key to preventing age-related health problems."