Experimentation with agriculture dates to 22,000 YBP at the site of Ohalo in the Galilee region of Israel. This period of time was characterized by the Kebaran culture in the Levant region of West Asia, on the eastern mediterranean coast. the succeeding culture (Natufian, roughly 14,000 YBP) was composed of semi-sedentary hunter gatherers living across the southern Levant that probably are the ancestors of the neolithic revolution`s first farmers. By the Pre-Pottery Neolithic A (roughly 11,000 YBP) the advent of farming had arrived with the arrival of the world`s first cities. Sites like Jericho sprang up across the Jordan Valley towards Syria`s Golan heights. By the later PPNB (9,000-10,000 YBP), the neolithic package would have spread to nearby Cyprus and Anatolia from an origin point further within the Fertile Crescent. By roughly 8,500 years ago the Neolithic package would have reached westernmost Anatolia and the fringes of the Aegean world. Sites first began to appear in south-eastern Europe (Greece and the Balkans) particularly at Knossos (Crete) and on peninsular Greece at Franchthi cave and Thessaly. by 5,000 YBP farming had spread across mediterranean and central Europe reaching the British Isles. The mtdna haplogroups most closely associated with the neolithic revolution and it`s spread are Mtdna`s K, X and N. On the y-dna side haplogroups G2a, H2, T1a and E-m123 subclades are associated with the neolithic revolution.