(A) Migrations occurred around 8,000 ybp of Early Neolithic people from the Near East to Europe carrying the main mtDNA (K1) and Y chromosome (G2a) haplogroups according to recent data on ancient DNA studies15,18. (B) Distribution of mtDNA K1 (circles) and Y chromosome G2a (rectangles) haplogroups in ancient samples dated > 5,000 ybp and their absolute frequencies. Site 1: Vinkovci Nama, Croatia23; site 2: Treilles at Saint-Jean-et-Saint-Paul, France19; site 3: Derenburg-Meerenstieg II, Germany22; site 4: Halberstadt-Sonntagsfeld, Germany21; site 5: South of Saxony-Anhalt, Germany18; site 6: Yamnaya, Russia21; site 7: Els Trocs, Spain21; site 8: La Mina, Spain21; site 9: Navarre, Spain38; site 10: Avellaner, Catalonia, Spain20; site 11: Gökhem, Sweden39,40; site 12: Köpingsvik, Sweden40; site 13: Gotland, Sweden40; site 14: Alsónyék-Bátaszék, Mérnöki telep, Lánycsók, Gata-Csotola, Bölcske-Gyűrűsvölgy, Budakeszi, Szőlőskert-Tangazdaság, Hungary23. (C). Distribution and approximate frequencies of haplogroup G2a-L91 in Europe based on the data from Rootsi et al.17. Maps of Europe available from Wikipedia Common web page (https://commons.wikimedia.org/wiki/File:Blank_political_map_Europe_in_2006_WF.svg?uselang=it#filelinks) were modified using Adobe Photoshop CS6 software.