[Technical Response] Response to Comment on “Whole-genome analyses resolve early branches in the tree of life of modern birds”

Science: Current Issue
Mitchell et al. argue that divergence-time estimates for our avian phylogeny were too young because of an “inappropriate” maximum age constraint for the most recent common ancestor of modern birds and that, as a result, most modern bird orders diverged before the Cretaceous-Paleogene mass extinction event 66 million years ago instead of after. However, their interpretations of the fossil record and timetrees are incorrect. Authors: Joel Cracraft, Peter Houde, Simon Y. W. Ho, David P. Mindell, Jon Fjeldså, Bent Lindow, Scott V. Edwards, Carsten Rahbek, Siavash Mirarab, Tandy Warnow, M. Thomas P. Gilbert, Guojie Zhang, Edward L. Braun, Erich D. Jarvis
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