Dr Sam Parnia: Life, death and in-between

We may never solve the question of what happens when our hearts stop and electrical activity in our brain flatlines, but science is giving this a good go now. Dr Sam Parnia is a British associate professor of Medicine at New York University's Grossman School of Medicine, where he is also director of research into cardiopulmonary resuscitation, director of the Human Consciousness Project at the UK's University of Southampton and author of the book The Lazarus Effect: The Science That is Rewriting the Boundaries Between Life and Death. He has been studying the moment of death for more than two decades.