Scientists believe that a mystery population lived in Europe after the last Ice age.
However, the origin of the newly discovered population remains a mystery, according to the scientists who conducted DNA analysis on ancient teeth and fossils from the period.
Johannes Krause from the institute said: “The main hypothesis would be glacial refugia in south-eastern Europe.”
By analysing DNA taken from 55 ancient Europeans, which dated back between 7,000 and 35,000 years, the team were able to chart the changes of the European population.
Mr Krause said: “This is the first glimpse at Pleistocene (the period during the Ice Age) population dynamics in Europe.