The book begins and ends with the visits to give the impression of a tunnel into their ancestors and family history. I believe in going backwards into the past - I felt I was digging a tunnel back to the past.
“I tried the paleo diet, which is the caveman diet - lots of meat. And I tried the calorie restriction diet: The idea is that if you eat very, very little - if you're on the verge of starvation, you will live a very long time, whether or not you want to, of course.”