The Implications_of_nanotechnology & other things.
http://www.youtube.com/watch?v=xlYIex2TF5g
http://www.theguardian.com/commentisfree/2007/nov/22/comment.comment
If someone has enough money, they might be able to live for a very long time.
http://www.nytimes.com/2013/01/27/magazine/ray-kurzweil-says-were-going-to-live-forever.html?_r=0