according to the special theory of relativity, it is impossible to say whether two distinct events occur at the same time if those events are separated in space. to speak of "the shape of the universe (at a point in time)" is naive from the point of view of special relativity. due to the relativity of simultaneity we cannot speak of different points in space as being "at the same point in time" nor, therefore, of "the shape of the universe at a point in time".