Finally, a bit of good news:
European studies find dementia rate down sharply | Nation & World | The Seattle Times
A new study has found dementia rates among people 65 and older in England and Wales have plummeted by 25 percent over the past two decades, to 6.2 percent from 8.3 percent, a trend researchers say is likely occurring across developed countries and that could have major social and economic implications for families and societies.Another recent study, in Denmark, found that people in their 90s who were given a standard test of mental ability in 2010 scored substantially better than people who reached their 90s a decade earlier.
Retreading for Retirement 