*Note: If you would like to suggest your publication for inclusion, and it is not yet in TimeTree (see list of studies ), you can send us the reference information for the publication using the contact page.

How It Works Two species or higher taxa are queried (e.g., cat and dog). TimeTree looks for these species in the TTOL to find their most recent common ancestor and produces the time estimate available. All studies with published times of divergence for that evolutionary split are shown in a Table format. When one or both of the species are not present in TTOL, the NCBI taxonomy is scanned to find the closest relatives of the species or higher taxa requested by the user. Then, those taxa are used as proxies and the most recent common ancestor identified to generate the final time estimates.

Poster The TimeTree of Life from an assembly of all individual timetrees from the Time Tree of Life book. Order an offset print or download the file to print your own.