The study reveals that the genetic composition of North Africa's human populations is extremely complex, and the result of a local component dating back thirteen thousand years to approximately 11,000 BC and the varied genetic influence of neighbouring populations on North African groups during successive migrations. According to David Comas, coordinator of the study and researcher at the Institute for Evolutionary Biology (CSIC-UPF), "some of the questions we wanted to answer were whether today's inhabitants are direct descendants of the populations with the oldest archaeological remains in the region, dating back fifty thousand years, or whether they are descendants of the Neolithic populations in the Middle East, which introduced agriculture to the region around nine thousand years ago. We also wondered if there had been any genetic exchange between the North African populations and the neighbouring regions and if so, when these took place".
