I originally posted this in Philosophy/Debate and surprisingly - it produced no responses. Surely some on here will find it as interesting as I did.
Interesting concept. I wonder how women-evolutionists feel about this matter.
http://news.yahoo.com/s/livescience/20070917/sc_livescience/maydecembercouplesboosthumanlifespan
"Older men who shack up with much younger women keep the grim reaper at bay for the human population and extend our species' lifespan, new research claims..."
" Women often lose their reproductive capacity around age 50, but if men can still reproduce into their 70s, Darwin would say it's advantageous for males to live longer lives providing they can hook up with a woman capable of reproducing. Natural selection should favor longevity-boosting genes, which would get passed down from fathers to both sons and daughters. So women would benefit as well in future generations, the scientists say..."