Is there any proven way to improve life expectancy?Personally, I’d like to make it to 100. Each year I try to eliminate one bad habit, and now I have none. That’s depressing.The average life expectancy in the U.S. today is 77.2 years. So, if you’re an average person who’s 77.1, schedule that annual physical real soon.Here’s something weird: the older you get, the ...