At 72, Robert McSherry says he's not yet ready to quit driving or ready to plan how he'll get around when that time arrives. But he's happy to get the insurance discount that comes with taking a driver safety class. John Daley/Colorado Public Radio hide caption

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To mark his 90th birthday, Dick Van Dyke has published a book with tips on how to stay young. Richard Shotwell/Invision/AP hide caption

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Belle Likover, a 95-year-old retired social worker, told Case Western Reserve medical students that growing old gracefully is all about being able to adapt to one's changing life situation, including health challenges. Lynn Ischay/Kaiser Health News hide caption

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Tablets of Lipitor and its generic equivalent, atorvastatin, are among the drugs commonly prescribed to prevent heart attacks and strokes among people at risk. Paul J. Richards/AFP/Getty Images hide caption

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Peter Lee, executive director of Covered California, (left) poses with his uncle, Philip Lee, and father Peter Lee (seated) at the younger Peter Lee's home in Pasadena, Calif., in 2013. Gina Ferazzi/LA Times via Getty Images hide caption

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Women with mild cognitive impairment, which can be a precursor to Alzheimer's, tend to decline faster than men. Lizzie Roberts/Getty Images/Ikon Images hide caption

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For 3-D food printers, chocolate is a good material to start with, because it's fairly simple to make it liquid inside the printer cartridge and solid once it drops out. Courtesy of Smart Gastronomy Lab, University of Liège hide caption

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Proposed federal rules would aim to minimize the use of antipsychotic drugs and increase training for nurses in dementia care. Jiri Hubatka/imageBroker/Corbis hide caption

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The varicella zoster virus causes chickenpox in children, then lurks in the body for years and can cause painful shingles later in life. James Cavallini/Science Source hide caption

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Chef Eric David Corradetti presents dinner to residents at the Bethlehem Woods senior living facility in La Grange Park, Ill. His kitchen emphasizes fresh produce and meats and meals made from scratch. Courtesy of Unidine hide caption

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A whole range of foods in common in the Mediterranean diet — from fish to nuts to fruits and vegetables — are rich in antioxidants and may protect against cognitive decline. iStockphoto hide caption

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