Just wondering a few wonders out (i don't have much knowledge about physics and stuff, just the basics, so don't expect me to not ask questions that don't make sense to some, or to know answers that should be obvious). Just too much thinking time on my hands. First, just wondering if a test has been done to see if gravity is faster than light or slower, or if this can only be done mathematically (being that gravity is part of the whole dimension thingy), or if the relationships of time, gravity and light, make it impossible to tell. Second, just clearing my understanding of The Way Things Are (only alot harsher than babe had to deal with). My current understanding of things (not that which has been learnt, but which has been evolved to make things easier to understand) is that everything can be thought of as waves in a 3d pond. Kind of the same as sound, only the ripples and compressions are made in the various dimensions. Very complex patterns in the way each dimension reacts with every other dimension represent what we are, or what everything is. Sounds silly as i type it, but something that needs to be cleared up. This would mean that what we call space is not, in fact, a complete vacuum of everything, it simply doesn't have as much in certain dimensional aspects. Only outside our universe is there a complete vacuum of everything. *As this is the third time i have had to go through this (my computer has stopped halfway through me trying to think things through to words) i have kinda forgotten where i started, so bare with me (lucky i managed to save some of the above). Feel free to ask about anything that is hazy.*-*make this the 4th time, power down from power lightning or wind - i think that someone is out there to stop me from posting this ;p* I'm not sure what einstein had to say about leaving the universe, but it seems to me that the main reason it would be impossible to leave is that the edge of the universe is where the dimensional matrix is expanding into nothing. So if we cannot travel faster than light, we cannot travel faster than the universe is expanding, hence we cannot leave it. Even if we did somehow manage to pop into existence outside the universe, we would become our own universe and spread out very fast. I am guessing that this is where string theory comes in with its 'branes' and the chances of collisions between universes (not that i know anything else about them other than the name and something vague that i can't quite remember). Can't seem to remember anything else for now, so feel free to point out where i went wrong (even if that was at the point where i began wondering).