which is the only way we can begin to understand and describe them. As science advances we begin to understand more. We now understand why the galaxies developed as they did and it has something to do with dark matter. But we don't yet know with any certainty what exactly dark matter is. Someday we probably will but that may just unveil another set of mysteries. Why is our visible Universe now comprised of mainly "matter" and not "antimatter"? Do the laws of Universes dictate that is the only possibility or is it just a random accident for ours?