Can We Live Longer? What Science Really Says About Human Longevity A longer life is worth pursuing. But how many of those extra years could we spend healthy, mobile and independent — and which treatments can actually help us get there? A hundredth birthday is easy to picture: a cake crowded with candles, a family photograph, perhaps a joke about the secret to a long life. What is harder to picture is the next morning. Can the person get out of bed without help, walk to a café, remember a conversation or decide what to do with the day? Now consider two possible futures. In one, people live longer and remain independent into old age. In the other, medicine extends life but also stretches the years spent coping with pain, disability or serious illness. Both count as longer lives. Only one is the future most of us would choose. That is the challenge behind longevity science. Researchers want to prevent early deaths, delay diseases that arrive with age and, eventually, find out whet...