When we first are taught mathematics we are introduced to dimensions (1st, 2nd, 3rd, etc.) But we are in an infinite universe. Grigori Perelman's proof of Poincare's Conjecture and Thurston's Geometrization are mathematics proof that we live in an infinite universe. Perelman's proof asserts that it is impossible to determine the shape of the universe. Infinity has no bounds. There is an infinity of dimensions. Dimensions enable the human brain to analyze abstract mathematical problems. Dimensions are a crutch that allow us to go to the next analitcal step which is symmetry. Symmetry is a logical grouping of dimensions. Reflections and Rotations of dimensions = Group. Example dividing the human face into equal halves produces a balanced group of reflections and rotations. In fact Group Theory is the study of symmetry.
Given: Space did not exist before the if Bang. And
Given: That space is expanding
Doesn't that mean space is finite?
Is actual question. I honestly don't know.
Going back to the Dark Matter search over decades and costing $BerberberBillions it wouldn't have been so bad if there had been some spin off benefits like non-stick frying pans re Moon landings...but no. Not so much as a...um..I don't know...a brown and sticky thing.
seem to be stuck on sticky things....oh, the irony!