Originally posted by: Novgrod
without explaining the bible thing, i can explain the age thing pretty easily:
If you were a Roman, you would have had a life expectancy at birth of 25 or 30. You would have had a 33% chance of dying before you hit age 1. You would have had a DALE (disability-adjusted life expectancy, or number of years you could work) of circa 10 years.
"Doctors" would have had no idea about life and death. Nobody would know that TB is caught from people who have TB, or that malaria is contracted from mosquitoes. You would have pooped in a pot, or in the street.
This lasted for a long, long time. Going back in time it was about the same, only more violent death and less plague (lower population density). Going forward in time it slowly improved as population declined and rose, then it really blew to be alive around the time of the plague.
Eventually people figured out sewers, and then they figured out germ theory, and, well, all the stuff in Civ3, and so life expectancy finally picked up a little. And now we're pretty good. Most people say that the maximum human life is circa 120 years: after that, your body just, well, gives up. This, incidentally, is called the rectangularization of the age pyramid: people are more likely to live to about the same age (right now in america it's really hard to die en masse before age 40).
Hope this helps.
But this doesn't explain why people in the bible lived into their 800s!