You'd like to read this very interesting article from BBC News about awareness. Self-conscience seems to develop between 18 and 24 months (see the video.
As Prof. Gallup says,
Death awareness is the price we pay for self awareness
This is the blog where counselors and therapists with the Lisbon Clinic of Therapy and Counseling (www.lisboncpc.org) write about mind issues, ideas, emotions, memories, dreams, art and life in general. You're welcome to voice your opinions. At Lisbon Clinic we value the capacity to enjoy life in spite of all its difficulties. We want to be both thoughtful and helpful.