When aging hampers memory, some people's brains compensate to stay sharp. Now scientists want to know how those brains make do — in hopes of developing treatments to help everyone else keep up.....
The question is how to gird our brains against time's ravages, a question becoming critical as the population grays. If you're 65 today, odds are you'll live to 83. But improving health care means people in their 50s today may live another 40 years.
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