Need another reason to take hard classes?

Higher education my benefit brains of elderly, study finds: "More years of education were associated with more active frontal lobes, areas known to be involved in problem solving, memory and judgment, the scientists reported.
Those who treat memory loss and other maladies of the elderly have long been intrigued by evidence that an active life of the mind might 'vaccinate' the brain against Alzheimer's disease and other chronic neural disorders that may appear over time.
Learning, they suspected, might be an effective preventive medicine."

interesting, but the study is far from complete.