Wrinkles, gray hair, age spots. There are lots of downsides to aging. Losing the mind, though, tops the list for many people. But fear not.

Just as research has demonstrated how important physical exercise is to aging well, experts now say there are things we can do to reduce our risk of mental decline, or even reverse it. It’s called the mental workout, and as baby boomers search for more ways to enjoy their longevity, interest in it is beginning to explode.

MSNBC.com