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Brotherton, Paul et al.-- The Genographic Consortium, Haplogroup H dominates present-day Western European mitochondrial DNA variability (>40%), yet was less common (∼19%) among Early Neolithic farmers (∼5450 BC) and virtually absent in Mesolithic hunter-gatherers. Here we investigate this major component of the maternal population history of modern Europeans and sequence 39 complete haplogroup H mitochondrial genomes from ancient human remains. We then compare this 'real-time' genetic data with cultural changes taking place between the Early Neolithic (∼5450 BC) and Bronze Age (∼2200 BC) in Central Europe. Our results reveal that the current diversity and distribution of haplogroup H were largely established by the Mid Neolithic (∼4000 BC), but with substantial genetic contributions from subsequent pan-European cultures such as the Bell Beakers expanding out of Iberia in the Late Neolithic (∼2800 BC). Dated haplogroup H genomes allow us to reconstruct the recent evolutionary history of haplogroup H and reveal a mutation rate 45% higher than current estimates for human mitochondria. © 2013 Macmillan Publishers Limited. All rights reserved., We thank the Australian Research Council (grant LP0882622), the Deutsche Forschungsgemeinschaft (Al 287/7-1 and Me 3245/1-1) and National Geographic’s Genographic Project for funding. M.v.O. was supported in part by the Netherlands Forensic Institute (NFI) and a grant from the Netherlands Genomics Initiative (NGI)/Netherlands Organization for Scientific Research (NWO) within the framework of the Forensic Genomics Consortium Netherlands (FGCN).