Since the turn of the 20th century, life expectancy in the developed world has risen from just shy of 50 years to nearly 80. But how much higher can it get? Author David Ewing Duncan's new book "When I'm 164" argues that advances in medicine and bionics will drastically increase our life expectancy in the next 30 to 50 years. What are the potential social, environmental and economic ramifications of extending our lives?
David Ewing Duncan's TedxBrussel's Talk