http://www.straightdope.com/mailbag/mdimensions.html

I tried to do a search for this topic but drew a blank, so here it goes:

I felt that the reply was a little unsatisfying. OK so we use 3 dimensions, no surprises there, but are there, or could there be, more dimensions?

I often toy with the idea by comparing the difference between the 3 dimensions. For instance, we 3 dimensional guys can get an overview of any 2 dimensional field if viewed far enough away, so would it be possible for a 4th dimension guy to see everything on earth, from it’s core up to every building, cave, creature etc. just by looking at it from a distance?

Could a 4th dimension guy pick up a book and read every word of it without even having to open it? We read in 2 dimensions (and a 2 dimensional guy would have to read in 1 dimension), so wouldn’t they read in 3?

Would a 4 dimensional object cast a 3 dimensional shadow?

Anyway, I think it’s an interesting idea. If anybody knows any websites or books dealing with this directly, I’m all ears.