Science's Tree of Life
An online diagram from the Science Tree of Life Special Issue includes links to a variety of resources to add context to the tree's graphical representation. Clicking on the labeled branch points (e.g., a snail is "Eukarya," "Metazoa") will pop up a brief summary of the characteristics of the branch. The taxa in the central column (e.g., "spirochaetes," "scorpions," etc.) are linked to Internet sites and Web pages with additional information on those taxa.