Originally Posted By: socratus

Euclidean space is two dimensions space

That's misleading. Both 2D and 3D spaces can be Euclidean. 3D Euclidean space is the most useful way of modelling the world as we experience it, even though pseudo-Euclidean spaces (Minkowski space, in the case of SRT) provide scientists with a better understanding of the large scale universe.

"Time is what prevents everything from happening at once" - John Wheeler