statistics are tricky. i'm cuurious about the methods used to determine average lifespan. mainly, infant and child death, if a quarter of the people born before say, 1930 died before the age of 5 then this wouuld explain alot of the change in life expectancy
another thought, concerning the human gene pool and our toxifying environment, i've often wndered about the effect of all the people living and reproducing today that would never have survived before the advent of modern hygene, antibotics, vaccines, etc. and what is the effect on the overall health of our population to have all these less than perfect genes floating about, "artificialy diluting" the more "fit" genes of the pre-science/medical revolution. just blathering, thanks