Here is a free book on life span. I am reading it now.
http://www.amazon.com/Aging-Design-Thinking-Change-ebook/dp/B005KCO8SS/ref=sr_1_5?s=books&ie=UTF8&qid=1337631718&sr=1-5 What I find interesting is what influence evolution may have on lifespan and why. Is long life a species survival strategy? Frank Znidarsic
