It's funny how some of the more advanced cosmological theories sound as if they came straight from the minds of stoned teenagers.
To wit: <a href="http://en.wikipedia.org/wiki/One-electron_universe" rel="nofollow">http://en.wikipedia.org/wiki/One-electron_universe</a><p>The universe is a strange place indeed.
Sure, it's one interpretation and a solution to the Black hole information paradox. But I don't like to talk about space without time, preferring this solution <a href="http://en.wikipedia.org/wiki/Black_hole_information_paradox#Information_is_encoded_in_the_correlations_between_future_and_past.5B14.5D.5B15.5D" rel="nofollow">http://en.wikipedia.org/wiki/Black_hole_information_paradox#...</a>
> They are negatively curved, any object thrown away on a straight line will eventually return.<p>Isn't that describing positive curvature (e.g. a sphere)?
Why it should be 2D? Three-dimensional hologram would totally works for us. Something like The Matrix and 13th Floor combined... You have everything in 3D around you and just a tiny part of the Universe (where you are currently looking at), because it is not possible to simulate the full Universe (the energy since the Big Bang till now won't be enough).
Anyone interested in this can find an excellent lecture here <a href="http://m.youtube.com/watch?v=dEaecUuEqfc" rel="nofollow">http://m.youtube.com/watch?v=dEaecUuEqfc</a> and of course by looking up leonard susskind's stuff on the black hole wars and universe as a hologram
What will happen when photons reach the outer boundary of the universe? Where time and space starts to slow down ... Will the photon also slow down, and then take an elliptic path? Might explain why the universe seem to expand in all directions.