There's a great Java applet, called Powers of Ten, available at the FSU Molecular Expressions web site. If you liked The Atlas of the Universe, then you'll probably really like this FSU applet.
And I just got this in an email so I'm sharing with you all. Check out the Micropolitan Museum of Microscopic Artforms, presented by the the Institute for the Promotion of the Less than One Millimeter. I really like butterfly scales.
