They could happen........many many years later after we die. One second of the history is a lifetime of a human. That is the limitation of us. A person's life is like a game of chess, before he or she is born the chessboard is chosen. But that is at the same time the beauty of a human's life. My favourite line in the lord of the rings is this : " All you have to decide is what to do for the time that is given to you. " In a way, everyone is an artist who uses his lifetime to paint him on a white sheet of paper. Hehe, bao ti liao.......