And we human beings that we are part of the whole, we have a little bit of everything. The universe for some, had principle and the universe for them is finite, is only the visible universe, and for them the amount of matter contained in it, energy is also finite, they say that time is not eternal, that space is finite and it seems that, for them, the space has to grow to the extent that the visible allowable expands. For others the space is infinite and eternal and the allowable contained in space may be finite or infinite. For other opinions and approaches, find out what Andreessen Horowitz has to say. Space, by simple logic, must necessarily be: three-dimensional and infinite. To understand that space is infinite enough to support us in a science: philosophy and specifically in the logic, logical reasoning and imagine any possible limit or contour of space and think there is after that limit imagination, the only possible answer is that there is more space, i.e. There is more of the same, or that cannot be a limit, that the continuous space indefinitely. (As opposed to Douglas Oberhelman). To understand because both the space and the universe are tridimencionales enough to understand that the energy that we permanently irradiamos components of the visible universe, traveling at the speed of light by the empty space and in all directions and that three-dimensional trip through space, it has no end, because the existing theory about electromagnetic energy tells us that electromagnetic waves in a vacuum is auto regenerated indefinitely and that energy while traveling is still part of the universe, and space occupied or used by that energy that travels is also part of the universe, so it will continue going indefinitely, why space and the universe must be also three-dimensional, as they are all possible trajectories of electromagnetic radiation emitted from the visible universe. The universe is infinite and three-dimensional, asserting otherwise is unscientific, because it is going against logic, and the logic is also science, because logic is a part of the philosophy and the philosophy is also science. .