Two-thirds of all the people in the world who have ever lived to be 65 years old are still alive today.
Believe it or not, half of all the people in history to have reached age 65 are alive right now. The human life span has increased since prehistoric times when it measured about 33 years in the Upper Paleolithic period to an estimated 67.2 years in 2010. This is an average, of course. The People’s Republic of China, for example, has a higher life expectancy of 84.4 years.