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Scientists for the first time have identified an elite group of elderly people age 80 and older whose memories are as sharp as people 20 to 30 years younger than them. And on 3-D MRI scans, the brains of these "SuperAgers" appear as young -- and one brain region was even bigger -- than the brains of the middle-aged participants. The SuperAger's cortex was astoundingly vital and resembled the cortex of people ages 50 to 65.
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