One of the world's most respected gerontologists says people are finally changing their mental pictures of what aging looks like.

Dr. HR "Rick" Moody, the director of academic affairs for AARP and a senior fellow at the International Longevity Center, says today's seniors are still concerned about things like arthritis and Alzheimer's disease but they're also focused on the great parts of a healthy, long life.

He says one of the main reasons his organization's name no longer stands for the American Association of Retired Persons is that 40 percent of the group's members are still working.

Find out what other age-defying tasks the 50+ crowd is accomplishing and what it means for people of all ages.

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