Related Experiment Video
Updated: Jul 19, 2026

A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
TimeTree: a public knowledge-base of divergence times among organisms
S Blair Hedges1, Joel Dudley, Sudhir Kumar
1Department of Biology, Pennsylvania State University, University Park, PA 16802-5301, USA. sbh1@psu.edu
Unlabelled:
Biologists and other scientists routinely need to know times of divergence between species and to construct phylogenies calibrated to time (timetrees). Published studies reporting time estimates from molecular data have been increasing rapidly, but the data have been largely inaccessible to the greater community of scientists because of their complexity. TimeTree brings these data together in a consistent format and uses a hierarchical structure, corresponding to the tree of life, to maximize their utility. Results are presented and summarized, allowing users to quickly determine the range and robustness of time estimates and the degree of consensus from the published literature.
Availability:
TimeTree is available at http://www.timetree.net
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