TIMETREE is a public resource for knowledge on the timescale and evolutionary history of life.A search utility allows exploration of the thousands of divergence times among organisms in the published literature. A tree-based (hierarchical) system is used to identify all published molecular time estimates bearing on the divergence of two chosen taxa, such as species, compute summary statistics, and present the results.
Blair Hedges, Sudhir Kumar at Arizona and Penn State Universities
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Kumar S & Hedges SB (2011)
TimeTree2: species divergence times on the iPhone.