One thing’s for certain: we all get older. But the biology of aging is still largely a mystery. As for getting sick as we age—we think that might be optional. At Salk, we are deciphering the molecular and cellular causes of aging, and searching for ways to stave off Alzheimer’s disease, diabetes, cancer, cardiovascular disease and other age-related ailments. We’re studying how the body heals itself, and we’re working on stem-cell technologies that may one day be used to replace organs damaged by injury and disease. They say aging isn’t for the timid, but we think bold science could help people stay healthy as they age.