[3] The pages are linked hierarchically, in the form of the branching evolutionary tree of life, organized cladistically.

Pages and Treehouses submitted took a considerably longer time to be approved as they were being reviewed by a small group of volunteers, and apparently, around 2011, all activities ended.

He wanted to extend this program with a feature that allowed the user to browse through phylogenetic trees and zoom into other lower or higher taxa.

The researchers came up with the idea to export the application into the World Wide Web and this was realized in 1995.

[5] The entire tree structure that contained 35,960 species until the website's demise, is available for download as a csv dataset.