What a wonderful place to visit. We saw the show, which discussed life in the universe. We also went to the under-the-ball presentation that talked about the big bang and introduced you to the 13 billion year spiral. Additionally we saw the short subject on black holes. After we came out of the black hole film I was talking to Ginny about gravity and when it comes into play with very small objects (sub atomic particles). Because these particles are thought of as point sources and they have mass then you can conceive of a sphere of small enough radius around such an object that would be smaller that the Schartzchild radius of the mass. When this is combined with the Hinesburg Uncertainty Principal the physics of the very small becomes undoable. For this reason a new way of thinking about subatomic particles has come about where they are no longer thought of as point sources but instead have extended dimensions. You can think of these particles as strings or loops, or even little floppy membrans perhaps in the shape of cylinders. Once you do this then the way these things can vibrate can be identified with the physical properties of the particle. Then if you allow these things to vibrate in more than three dimensions (say 10) you get enough freedom to get all the properties and particles that are now known. These other 7 space like dimensions may be compact dimensions that we are not be able to directly detect. These ideas are part of string theory or M-theory.