The fishtrap image is a map of Powers of Ten Interactive.  It is a metaphor for the matrix of information on the disk and, thus, on this site. Ultimately you will be able to use it to navigate this site. For now, you  can use it to see the content that is on this disk. In the CD-ROM, itself, it is  a browsing interface.

The colored lines represent the six different  strands of Powers of  Ten Interactive: