The size, shape, and age of the universe, as well as how it began, are, however, all points of contention. Current theories on the universe means that scientists are only able to account for 4% of the matter in the universe, so new theories of dark matter (unseen matter) have been developed to explain this.<ref>[http://www.msnbc.msn.com/id/20360059/ Where is the rest of the universe?]</ref> | The size, shape, and age of the universe, as well as how it began, are, however, all points of contention. Current theories on the universe means that scientists are only able to account for 4% of the matter in the universe, so new theories of dark matter (unseen matter) have been developed to explain this.<ref>[http://www.msnbc.msn.com/id/20360059/ Where is the rest of the universe?]</ref> |