*** The life expectancy of Ancient Greece was 30-35, right? It's not uncommon to find people living until their 80's-90's today. *** These are not equivalent. Much of the increase of life expectancy in the last century or two is the reduction of infant and child mortality. Also, it's been less improvement in medicine than public sanitation (water, sewage, food storage, etc.). In more recent decades, medicine has 'come into it's own', though. Trying to extend these trends into the future makes real scientists quake at night. ;->= I know I can't. The_Beast -Douglas J. Evans, curmudgeon One World, one Web, one Program - Microsoft promotional ad Ein Volk, ein Reich, ein Fuhrer - Adolf Hitler