In our daily lives, we are bombarded constantly by images. But there is one image whose power over us is strangely mesmerizing. It terrifies and yet reassures us — it is the image of death. We build grave yards, and we even carry pictures of the dead. But why? What makes us surround ourselves with constant reminders of death? Experts think this preoccupation is rooted in the human mind; unlike animals, humans understand the inevitability of their own death and in fact can imagine a world in which we are no longer alive.