Can we defeat death?

We could be getting closer to a long delay. Scientists believe that modern old age means we're not living longer, but dying for longer. This has made the quest to make death optional, or at least meaningfully delay it, is no longer a fringe pursuit. Somewhere hidden in our biology is the reset button of youth. Anjana Ahuja explores new methods to circumvent the ageing process as tech titans invest in the quest to extend our lives.