I would like to thank the visual artist and designer, Angela Moore, for taking on the foolish task of collaborating with me on this project. She designed many of the images for this text, and we worked together on selecting several others.

I would also like to thank Marcia Ochoa for her web design assistance. Finally, I would like to thank Suzi Grishpul for web development and for sticking with this project through to its completion.

This piece is based in part upon work supported by the National Science Foundation under Grant number SBR-9818409. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.