4D Misconceptions

One of the biggest mis-conceptions about the fourth dimension is that the fourth dimension is an alternate reality. Other misconceptions is that the fourth dimension is completely separate from where we are today. Much like a 2 dimensional plane can exist within our 3 dimensional universe, our 3d universe lies within a 4 dimensional realm. This does not mean we are fourth dimension either. Much like if I were to put a 2 dimensional plane inside a 3 dimensional box, the plane is within the 3d box but the plane is still 2 dimensional. What we should be concerned about when considering that our universe lies within 4 dimensional space, is what correlations do we make?

Another big misconception is time travel. People confuse the words light speed, 4th dimension, time, space, gravity. While Einstein considered that the time is the effect of our 3d universe passing through the fourth dimension, it is not correct to make assumptions regarding the ability to "time travel". Einstein furthermore regarded time as being relative so without absolute time, time travel (in the conventional sense) becomes even more questionable. The point I am trying to make is that time travel would not consist of a stroll down 4th dimension lane.

Time travel has more to do with the relationship of space and time regarding our speed. Theoretically, Einstein said, if we could go at the speed of light, while our speed is not infinite to an observer, that we would have the effect of going any amount of distance in an instant. The problem with overcoming this is that as matter's speed approaches the speed of light, it gains in mass, ultimately making is even harder to go faster. Some people like to regard this as nature's way of preventing us from messing with her laws.

Speculation is the first step to discovery. One should not be discouraged. First we must consider what we know, then make speculalations on the unknown.