posted on Mar, 26 2008 @ 05:02 PM
The only way we can currently detect dark matter is by it's gravitational field. They think that it may be made of WIMPs, or weakly interacting
massive particles, however they haven't discovered any of them yet. My personal thoughts are that if they can determine it's not WIMPs, then it's
matter in the other dimensions. I think that the different universes generally have galaxies in the same spots, and this would lead to a massive
concentration of mass. However, if there is a multiverse, it would be practically infinite, so maybe gravity is strongly reduced when it crosses, or
maybe the gravitational constant in our universe is unusually low or something.