A nice flash web site has been created to promote Rob Bryanton’s book “Imagining the tenth dimension”. The introduction states:

“In string theory, physicists tell us that the subatomic particles that make up our universe are created within ten spatial dimensions (plus an eleventh dimension of “time”) by the vibrations of exquisitely small “superstrings”. The average person has barely gotten used to the idea of there being four dimensions: how can we possibly imagine the tenth?”

The really interesting part of the site is the flash animation describing the 10 dimension.