Some interesting information, it is interesting I actually feel this to to be true, since I have been back to school my mind seems more awake.

Age 35 to 55? You'd Better Do This Daily
Use it or lose it. We're talking about your mind.

In a study with more than 5,300 people, researchers from University College London have determined that people ages 35 to 55--that is, those who are approaching and in the middle-age years--who participate in intellectually challenging leisure-time activities, such as reading or taking classes, have sharper minds than people who prefer solitary activities, such as gardening or household tasks. And doing this from ages 35 to 55 will help protect your mind as you age.