The Indo-European languages belong to one of the widest spread language families of the world. For the last two millenia, many of these languages have been written, and their history is relatively clear. But controversy remains about the time and place of the origins of the family. A large international team, including MPI researcher Michael Dunn, reports the results of an innovative Bayesian phylogeographic analysis of Indo-European linguistic and spatial data. Their paper 'Mapping the Origins and Expansion of the Indo-European Language Family' appeared this week in Science.