Surprising signs of Longevity

Consider this: In the 20th century, the average life expectancy shot up 30 years — the greatest gain in 5,000 years of human history. And this: Centenarians — folks who make it into the triple digits — aren't such an exclusive club anymore, increasing 51% from 1990 to 2000. How to account for these dramatic leaps? Advances in health, education, and disease prevention and treatments are high on the list — and that makes sense. But what you may not know is that seemingly unimportant everyday habits, or circumstances in your past, can influence how long and how well you'll live.