We know that time and space are essentially the same thing. We know that the universe is expanding, but we seem to be baffled as to why. What if the universe is expanding because if it weren't, time wouldn't move forward? What if the reason the expansion is accelerating is that space has to increase in size proportionally to its current size for time to remain at a constant rate? What if the universe is expanding for us at its accelerated rate, BECAUSE we perceive time as a constant? We don't need dark matter/energy.