The average lifespan of a human that looks after themselves but doesn't pay attention is about 80 ... If you do the right things in your life—which is eat healthy food, don't overeat, don't become obese, do a bit of exercise, get good sleep, and don't stress—that gives you, on average, 14 extra years. That gets you to 94. So, getting to 100, if you just focus on what I'm talking about, it's not a big deal.