>>first of all, sorry that you were shot down so quickly. people really should be prefacing their comments with "anything is possible" because we understand so little, anything indeed is possible. we think that a lot of things, like warp speed travel, are highly unlikely given our current understanding of physics.
>>the "ground" to which you are referring is gravitational, it seems to me, so I think it would have to be warped with massive energies, precluding our ability to navigate "over" it
>>strangely, ether has long been discredited but we now believe in "virtual particles" that permeate all of space, including empty space. the fact that it is all-pervasive makes it the New Age Ether/Fabric of Space (
http://universe.gsfc.nasa.gov/science/darkenergy.html)