I'm not the math genius that my son is, but I'm still a geek who likes reading on most scientific subjects, history, economics, the Bible, math, and gardening. I'm currently reading a >1000 page book on geology and its catastrophic cause, a book on genetics and the link between races, "Traced", and Calvin's "Institutes of the Christian Religion". When I tell most people about what I am reading, their eyes either open in amazement or glaze over in total disinterest. I look at it as "if you aren't learning, you are already one foot in the grave". I just read an article about a study that said if you are over 50 and read >3.5 hours a week, then you are 20% more likely to stay alive over 12 years, so I guess there is some "scientific" evidence for my theory.