Reply to Hedges et al.: Accurate timetrees do indeed require accurate calibrations.
Jennifer L MorrisMark N PuttickJames W ClarkDianne EdwardsPaul KenrickSilvia PresselCharles H WellmanZiheng YangHarald SchneiderPhilip C J DonoghuePublished in: Proceedings of the National Academy of Sciences of the United States of America (2018)
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