However, the primary branch H2 (P96) seems to have been found in sparse levels primarily in Europe and West Asia since prehistory. Pre-Pottery Neolithic B (PPNB) is part of the Pre-Pottery Neolithic, a Neolithic culture centered in upper Mesopotamia and the Levant, dating to years ago has been found in remains also the later Linear Pottery culture and Neolithic Iberia. H2 likely entered Europe during the Neolithic with the spread of agriculture. Its present distribution is made up of various individual cases spread out throughout Europe and West Asia today.