# Travel and locate extra dimensions

I'm a newbie to String Theory.

String Theory says there are extra dimensions apart from the 4 known ones (space and time).

1. Even if the extra dimensions are very small, what makes the theory say they can't be located in a room saying their coordinates are $$(x, y, z)$$ at this $$t$$ time? Any analogies, since this is beyond my imagination.

2. If there are dimensions, shouldn't we / anything else be able to travel in them without even touching the other coordinates like $$x, y, z$$ and time?

EDIT :

Thanks for the answers ! But i would like further clarity . The main point of asking this question was the following :

The extra dimensions are extremely small, which i can imagine with no issues. But i would like to know why they (extra dimensions) cannot be just expressed as say infitesimally small 'pockets' at say (x,y,z) in space.

For example, I have a very small object at (7,0,0); anywhere this object moves in x axis; we can never use y and z axis to point it's location; making x axis 'unique'. Similarly for y and z axis. They are 'unique'.

So if the other space dimensions exist in our 3D space , they should be somewhere in (x,y,z) , which doesn't make them unique, right ?

• "So if the other space dimensions exist in our 3D space , they should be somewhere in (x,y,z) , which doesn't make them unique, right ?" By definition, dimensions beyond x,y,z cannot be located by x,y,z. Note that dimensions aren't "places" or "realities", as Hollywood movies may imply, but just independent directions. Dimensions are not located somewhere, they are measuring tools by which to locate things. ... – electronpusher Oct 23 '19 at 13:28
• ... It is clear from our human experience that there exist (at least) 3 dimensions ("directions"). String theory posits that there are many more possible directions, but they are very small and twisted up. If you feel you can imagine these tiny extra dimensions "with no issues", you might be missing something. – electronpusher Oct 23 '19 at 13:28