Centenarians shatter myths about aging.

Examines how rapid growth in the number of centenarians in the United States is forcing society to reexamine what it believes about aging. Research indicating that old age can be more productive and independent than previously believed; View that the retirement age of 65 may be too early; How increasing health and longer productivity of the elderly may offset some of the economic burden that planners have assumed for elderly America. INSET: Freda Fielder's 'secret' to a long life.