Welcome to the Tree of Life Portal, the place where anyone can explore and learn about species of life and their interelationships — a field of study known as phylogenetics. The root of the Tree of Life begins with the three recognized domains of cellular life, Archaea, Bacteria and Eukaryotes, with Viruses being of uncertain origin.
It's easy to explore the Tree... just hover over the
« Directory to the left, navigating with the mouse and clicking on individual branches to learn more.
The Tree of Life Portal project is just starting, and we're looking for contributors to help expand it. The Tree also includes the Animals Portal and the Plants Portal, with more domain-specific life portals on the way. LEARN MORE »
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Featured Article
Bacteria (overview)
Bacteria (singular: bacterium) is a large group of unicellular microorganisms. Formerly known as Eubactaria or "true bacteria" to distinguish them from Archaea (formerly known as archeabacteria),...
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Animal Diversity Web
Animal Diversity Web (ADW) is an online database of animal natural history, distribution, classification, and conservation biology at the University of Michigan
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Note: this article is a draft from Citizendium. If you'd like to help improve the article, please register wit...
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The Archaea are a group of prokaryotes (cells that lack nuclei and other organelles) that were first discovere...
Encyclopedia of Life (EOL) is a free, online encyclopedia that intends to document all of the 1.8 million livi...
ARKive is a global initiative to gathering together the very best films and photographs of the world's species...
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