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Posted by JohnCauthen on October 10, 2003 at 17:16:29:

In Reply to: Re: thanks! posted by JohnCauthen on October 10, 2003 at 16:26:49:

The universe, space itself, has to be physically made of something. Think of the universe as being made of something physical and solid, like real strings that are three-dimensional, and we are in a web of strings. Think about traveling through that space, and our bodies are a bunch of particles. The particles that make us up only travel along the web of strings. Strings are like a real web in space.

But we know strings are only two-dimensional. The third dimension of a string, which gives it tension and strength, and makes it work is the Vacuum. So we have something that appears to be made of nothing. Space is like the matter of our body: it is points and a lot of nothing. Imagine a space of actual strings that are formed in three dimensions, with two dimensions of points and one dimension of vacuum. Strings are real and three-dimensional, but one dimension is the vacuum, which is nothing, so it looks likes space, but it is a web of strings. When the particles that make your body travel along the strings that make up space, your particles, as it turns out, can only go in 7 directions. There are about 20 other secondary directions they can go if your particles skip points and go between points.

You can see matter particles going in these directions and avoiding certain directions in particle colliders. Particle collisions never scatter in symmetrical fans, like an explosion in the macro world, but scatter in jets of particles following lines of underlying dimension. The seven extra dimensions of string theory are the underlying structure that space itself is made from, a structure that only allows travel in 7 easy directions and about 20 secondary directions.

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