Smaller,but Larger?? You may have a look at the attachments,which are the key parts of my problem. And the full text is here:http://arxiv.org/pdf/gr-qc/9905084v5.pdf How to understand "The outermost surface of the warp bubble will have an area corresponding to a radius of approximately 3×10−15 m, while the inner diameter of the ‘pocket’ is 200m."??Something about higher dimensions???