Although a bachelor's degree is generally something that is considered a young person's domain, it is never too late to further one's education. A fondness for learning is in deep corallation with a passion for life and a positive outlook. It may very well be that Dickinson College's 101 year old alum has prolonged his life through his love of learning.
Yes, education is the secret to a long life, because it teaches a person good behavior. We educated ourselves that smoking is bad for you. Because we know that now, we are able to make healthier choices. Education teaches a person how to take care of themselves, and how to take care of society on a macro level.
I watched a programme last night about mental health, they were saying that there is a clear link to people with mental health issues improving when they have a job. I think this makes perfect sense. When working there is a distraction to the issues of the brain and it is harder to become engulfed in them. Most careers look for a degree of education so it is the building blocks to becoming successful in the workplace.
Keeping your brain sharp is an important part of a long and healthy life. Studies have shown that doing simple things like sudoku puzzles can help keep your brain active and help prevent some age-related memory problems, Any type of learning can keep your brain healthy and active. I think the old saying "if you don't use it you'll loose it" is the perfect way to explain why we need to be constantly learning.