"Empty Space" Just a quick thought you might enjoy. I was reading a book on quantum gravity the other day when I found myself having a lot of trouble grasping the idea of empty space. When you really sit back and take it in, it is so weird only because we never really experience it. Another interesting thing that I found with "empty space" is that whenever we dig deeper into smaller particles, it seems we always introduce more space, from this one might think that the smallest thing would indeed be space itself considering i do not think most have a hard time accepting it as the biggest thing also. One other thing I thought about was how most people can look into the sky and consider it "empty", obviously we know it is full with countless atoms just too small for the human eye to see. Well taking this into perspective it would seem that the "empty space" in atoms could easily harbor smaller particles just too small to detect.