What would a cosmological model without dark matter and dark energy look like? This requires imagining that the observational evidence for dark matter and dark energy are explainable by other means. In other words, absent of the idea that the universe is filled with 25%DM and 70%DE, but rather having 100% of the the mass in the universe being what is observable (what we now see as only 5% of the mass), what kind of model would we arrive upon? To further clarify, if it did not appear that the universe were accelerating in expansion, and it did not appear that there is more mass in galaxies than the normal matter, but rather that regular matter is all there is, combined with the current rate of expansion, would the universe have to be open? What other problems would occur having normal matter and energy be all there is in the universe? Again, ignoring the experimental data saying that the universe is accelerating and there is more mass, what would the problems be in the universe without DM and DE?