There is a very, very cool interactive demo that Nikon is presenting over on their site called the Universcale.
Let’s see, how can I describe it… well, it’s kind of like this video which I previously posted that shows how the size of our planets relate to other objects in the universe, except that the Universcale is interactive and also goes the other way all the way down to subatomic particles.
It really has to be seen to be understood, and it is well worth seeing.
Props to Webware for the find.