It’s a bit of a mystery why, despite its age, the human body seems to keep on ticking.
We’re programmed to survive for many more years than most mammals and so it’s only a matter of time before we’ll be living forever.
But how long does it take to get there?
To find out, we asked some experts to explain how many life-threatening deaths they have experienced.
We asked Dr Michael Bouchard, director of the University of Exeter’s Institute for Bioethics, and Professor Chris Bevan from the University at Albany, to answer these questions.
Why do we die?