Isotope analysis of 2000-year-old skeletons buried in Imperial Rome reveal some were migrants from the Alps or North Africa, according to a study published February 10, 2016 in the open-access journal PLOS ONE by Kristina Killgrove from University of West Florida, USA, and Janet Montgomery from Durham University, UK. Previous work has focused on the overall human migration patterns within the Roman Empire. To understand human migration on a more granular level, the authors of this study examined 105 skeletons buried at two Roman cemeteries during the 1st through 3rd centuries AD. They analyzed the oxygen, strontium, and carbon isotope...