We are all aware of aging in humans from our earliest years, through normal, daily contacts with family members, neighbors, and others who have reached an advanced age. Perhaps because aging seems such an intuitively obvious phenomenon, it was quite late in becoming an object of formal study. Magical cures and restorative waters aside, the first serious scientific studies of aging did not get under way until the early part of the present century. The initial pace of research in the entire field of aging was slow; respectable scientists and physicians were doubtless deterred by the unsavory history of quack remedies and practices aimed at increasing human lifespan that had characterized the previous several centuries, as well as the first part of the twentieth century.
Perhaps we felt we didn't need a bunch of highly trained professionals telling us about getting old. We recognize it when the first signs appear in our own bodies—usually earlier than we might have expected from observing others. Elderly people look and behave differently than people in the early and peak years of their lives