If ever there was an incentive to develop "superior" language skills at a young age! This study of nuns' brains suggests that a strong command of language in one's teens and 20s tends to ward off the symptoms of dementia and Alzheimers' disease in old age. Read it for yourself here.
Should wave this at my kids if they ever ask why we're such grammar nazis grading their scripts. But with my kind of memory... er, what was I saying...?