How long do you think the lifespan of humans will be in 50 years? 100 years?
I am optimistic and I think that with advances in genetic enginering, nanotech and medicin we will ultimately be able to live as long as we want to.
Just imagine when nanotechnology advances and we can inject millions of small repair nanobots to fix and improve things in our bodies. Targeting cancer cells, viruses, bacteria. Removing atherosclerosis manualy.
Or when we can grow new limbs and organs from steem cells and just replace them when our original body starts to get worn out.
Not to mention integrating computer chips and similar things into the body, improving memory and other brain functions and making sure the brain can go on indefenetly.
If someone has read Peter Hamiltons Comonwealth saga thats my vision of the future. Would be fun beeing part of the first generation that takes babysteps towards imortality.