From the Hillis/Bull lab at the University of Texas at Austin:
This tree is from an analysis of small subunit rRNA sequences sampled from about 3,000 species from throughout the Tree of Life. The species were chosen based on their availability, but we attempted to include most of the major groups, sampled very roughly in proportion to the number of known species in each group (although many groups remain over- or under-represented). The number of species represented is approximately the square-root of the number of species thought to exist on Earth (i.e., three thousand out of an estimated nine million species), or about 0.18% of the 1.7 million species that have been formally described and named.
Free for non-commercial educational purposes. They recommend printing at least 54″ wide.
2 thoughts on “Massive printable “Tree of Life” graphic for free download”
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I had an older link for a program that might make it slightly easier for some to print out the poster if they don’t have access to a printer wide enough for the recommended size.
http://lifehacker.com/5468489/easy-poster-printer-slices-and-dices-your-posters-for-standard-printers
Although I’m not sure if that program can do anything with a PDF. I haven’t had the time to test it out with the Tree of Life graphic.