Barb Shaeffer, 85 when this photo was taken, works on one of the two crossword puzzles she did every morning in her kitchen in Chicago, Illinois, August 16, 2012. Shaeffer is part of a Northwestern study of superagers, elderly people who continue to stay cognitively sharp even as they age.
Barb Shaeffer, 85 when this photo was taken, works on one of the two crossword puzzles she did every morning in her kitchen in Chicago, Illinois, August 16, 2012. Shaeffer is part of a Northwestern study of superagers, elderly people who continue to stay cognitively sharp even as they age. Heather Charles MCT
Barb Shaeffer, 85 when this photo was taken, works on one of the two crossword puzzles she did every morning in her kitchen in Chicago, Illinois, August 16, 2012. Shaeffer is part of a Northwestern study of superagers, elderly people who continue to stay cognitively sharp even as they age. Heather Charles MCT

They’re 80, 90, 100 years old and sharp as tacks: Can a social life delay dementia?

December 31, 2017 01:27 PM