How many times have I found myself trying to explain the concept of an n-dimensional space while lecturing on Vectors and Matrices in Elementary Linear Algebra?

Very often, it is quite difficult for my students to visualise a world beyond three dimensions - which is absolutely normal given that the concept is itself extremely abstract. So I try to levitate them into some kind of fantastic world which, for the moment, can only be imagined but not lived ... Moment? A word which has no real significance outside our humanly-defined 'space-time' continuum.

Some of us don't have the time to ponder on the intricacy of the mathematical implication of an n-dimensional space because they have more important things to do in life whilst others are more interested to venture in no human's land ... Can we travel back and forth in time? Is it possible to exceed the speed of light? Do parallel universes exist? Does Einstein's Theory of Relativity have any flaw?

Such a multitude of questions which, apparently, have been answered by a certain Mr. Moon, who has recently created an alternative theory called the 'Vortex Theory' which boasts to give all the solutions on the matter, even pretending to be much better than Einstein's ...

Whatever be the case, you will very soon find out that, after all, UFOs may exist. But, to be honest, if can you digest all the information contained here and eventually visualise what could possibly be a four-dimensional space, then you'll be one of the rare ones.

As for me, I always find it rewarding to know that at least one of my students listens to my words carefully. So, on your request ...