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Buying Time - The quest to live longer, look younger

Living Longer in America
What's your chance of reaching a very old age? That can depend on when you were born and even where you live. Click to find out more.
How the body ages
Interactive: How the body ages
Why do we get wrinkles, gray hair and stiff joints as we grow older? Click to learn about the aging process.
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Image: Priscilla Presley 1968; 2008
  How celebrities are aging
We asked Dr. Tony Youn, a Michigan-based board-certified plastic surgeon, to weigh in on what work, if any, celebrities may have had done. (Youn hasn't treated any of those featured.)

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