I remember once I was having a discussion with someone where the main point was that humans and almost every other living thing is confined between the flow of time. We cannot go back in past nor can we explore future by moving back and forth in the running train of time. At any moment we are bound to a single point in time. I know what I'm saying sounds weird - perhaps only because we cannot imagine any other possibility. It could be ascribed to the failure of imagination not to the impossibility of another alternative possibility. It's just as saying why humans don't have eight or three fingers instead of five on each hand. What are your views on this? Please let me know. Thanks.