My high school maths teacher was trying to make the class understand about the concept of the infinite. He said space is infinite, which i proceeded to argue. He said because space is nothing, and there is nothing after it, it is infinite. I started thinking and came up with this idea. One of the characteristics of space is that it has the potential to be filled (we can put a man in space). Beyond space nothing can exist for it is there is no longer any space or time. The end of the space time contineum if you will. If anything travelled into this it would cease to exist. I would love to here some thoughts on this, expecially if there is some scientist guy who thought it up before me, or even better if there wasn't.