I think your mixing time continuity with evolution,, there is just consistent evolution your recognizing the time you were born as a beginning and death an ending but you were just made of sperm and egg which was made from elements on the earth. Note: everything exists cause you exist , if your not alive to be an observer how could you know something was there,, and this days hearing from another observer has its own limitations cause every observer express it on his/her own understanding that conflicts with the fact that existence need and observer for something to exist.