title: Precision of molecular time estimates.
authors.affiliation: NASA Astrobiology Institute and Department of Biology, Pennsylvania State University, University Park, PA 16802-5301, USA. sbh1@psu.edu
authors.forename: S Blair
authors.initials: SB
authors.lastname: Hedges
authors.forename: Sudhir
authors.initials: S
authors.lastname: Kumar
mesh_terms: D000818:Animals; D001717:Birds; D002138:Calibration; D019143:Evolution, Molecular; D005580:Fossils; D008322:Mammals; D010802:Phylogeny; D013997:Time Factors