Not many people make their 100th birthday. It’s a big deal, and rightly so: the family celebration and obligatory photos, the card from HRH (not so far off the Big Day herself), perhaps a write-up in the local paper. “Tell us!” the journalist asks, “what is the secret of your longevity?” We collectively lean forward to catch their snippets of wisdom. What is their secret? A Philosopher’s Stone? The Elixir of Life? After all, living for a Very Long Time is as close to immortality as we can achieve in the here-and-now.