>Are we to assume that the normal lifespan of Homo is approx. >35-40
years(high fat, arctic cultures) and the advent of fresh >vegetables and
fruit transport has taken us into this new realm >of excessive age(over 40)
and it's consequences.

there's infinite variety here...over the years i have seen the 'downside'
age - between 25 and 40, being shafted home to the 1920's, 1850's, middle
ages, roman times, etc. its a laugh and a half.

andrew