At what moment are you dead? - Randall Hayes

View full lesson: http://ed.ted.com/lessons/at-what-mom... For as far back as we can trace our existence, humans have been fascinated with death and resurrection. But is resurrection really possible? And what is the actual difference between a living creature and a dead body anyway? Randall Hayes delves into the scientific theories that seek to answer these age-old questions. Lesson by Randall Hayes, animation by Anton Bogaty.