I am currently 23 and 1/4. I leave a healthy lifestyle. I exercise and try to eat right, I don't smoke or drink. There is no history of male cancer in my family, or any other major illness that I am aware of. My question is, how long can I expect to live? From my understanding, life expectancy is an average, and therefore brought down by people who die young, so I'm guessing I will live a little bit longer than that. Also, life expectancy could increase by the time I am old, and there may be breakthroughs that help improve life expectancy. How likely is this?