here. Neanderthals survived this abrupt change in the environment, so it's possible for other human groups too. According to the theory humans survived in Africa, and began to resettle areas north, as the effects of the eruption slowly vanished. Upper Paleolithic revolution began after this extreme event, the earliest finds are dated c.50000 BCE. A divergence in genetical evidence occurs during the early phase of the glaciation. Descendants of female haplogroups M, N and male CT are the ones found among Eurasian peoples today. Upper Paleolithic The Southern Dispersal scenario postulates the arrival of anatomically modern humans to Eurasia beginning about 70,000 BC. Moving along the southern coast of Asia, they reached Maritime Southeast Asia by about 65,000 years ago. The establishment of population centers in Western Asia, the Indian subcontinent and in East Asia is attested by about 50,000 years ago. The Eurasian Upper Paleolithic proper is taken after c. 45,000 years ago, with the Cro-Magnon expansion of into Europe (Mousterian), and the expansion into the Mammoth steppe of Northern Asia. Migrations Tracing back minute differences in the genomes of modern humans by methods of genetic genealogy, can and have been used to produce models of historical migration. Though these give indications of the routes taken by ancestral humans, genetic marker dating is becoming more accurate. The earliest migrations (dated c. 75.000 BP) from the Red Sea shores have been most likely along southern coast of Asia. After this, tracking and timing genetical markers gets increasingly difficult. What is known, is that on areas, of what is now Iraq, Iran, Pakistan and Afghanistan, genetic markers diversify (from about 60000 BCE), and subsequent migrations emerge to all directions (even back to the Levant) and North Africa. From the foothills of the Zagros, big game hunting cultures developed which spread across the Eurasian steppe. Crossing the Caucasus and the Ural Mountains were the ancestors of Samoyeds and the ancestors of Uralic peoples, developing sleds, skis and canoes. Through Kazakhstan moved the ancestors of the Indigenous Americans (dated 50000 - 40000 BCE). Eastbound (maybe through Dzungaria and the Tarim Basin went the ancestors of the northern Chinese and Koreans. It is possible that the routes taken by the Indo-European ancestors travelled across the Bosphorus. Genetic evidence suggests a number of separate migrations (1.Anatoleans 2. Tocharians, 3 Celto-Illyrians, 4.Germanic and Slav, - possibly in this order). Archaeological evidence has not been identified for