I am closing in on the big 4-0 as well and have been thinking about it more than usually because my wife is having her birthday today so age is a central theme for us today :)
In my opinion longevity is a very interesting topic when coupled with technological innovations. We might soon be able to expand human life spans to numbers we have never seen before and even the topic of immortality is up in the air among certain experts!
Personally I am at least a firm believer in a future where we will be able to live a youth like life for much longer. If we will get older than 120 is not certain, but we should at least be able to live up to that age without too much illness.
I am looking forward to your follow up with the effects of a global aging population.
ronni
Wow, happy birthday to your wife!
It's amazing how big an impact scientific discoveries and technological innovations have already had upon human civilization in the past few centuries, and it seems the pace of innovation is ever increasing.
Yes, I wouldn't be surprised if people can live past 120 in the near future. Maybe we will even see that in our own lifetimes!