The DNA research agrees with paleoanthroopologists and the Sumerian account that modern humans originated in a location somewhere in Africa. The presence of ancient gold mines in southeastern Africa seems to coincide with the Sumerian accounts of the location of the first human hybrid workers. Geneticists also place the earliest ancestors of modern humans somewhere in sub-Saharan Africa. Both the genetic studies and the dates for the Annunaki genetic engineering with humans calculated by Zecharia Sitchin (from dated king lists) fall in the same general time period: 200,000 to 300,000 years ago. (Gods, Genes, and Consciousness)
The Babylonians themselves knew very little about the lengths of the reigns and the dates of the earliest Sumerian kings, a fact that is clearly proved by the lists of kings and dynasties compiled by them. According to one tradition, 10 kings reigned before the Flood for a period of 456,000 years, and according to another, 8 kings reigned for a period of 241,200 years. (Babylonian Life and History)
445,000 BC: The Nefiliro, led by Enki, arrive on Earth from the Twelfth Planet. Eridu - Earth Station I - is established in southern Mesopotamia.
430,000 BC: The great ice sheets begin to recede. A hospitable climate in the Near East.
415,000 BC: Enki moves inland, establishes Larsa.
400,000 BC: The great interglacial period spreads globally. Enlil arrives on Earth, establishes Nippur as Mission Control Center. Enki establishes sea routes to southern Africa, organizes gold-mining operations.
360,000 BC: The Nefilim establish Bad-Tibira as their metallurgical center for smelting and refining. Sippar, the spaceport, and other cities of the gods are built.
300,000 BC: The Anunnaki mutiny. Man - the "Primitive Worker" - is fashioned by Enki and Ninhursag.
250,000 BC: "Early Homo sapiens" multiply, spread to other continents. (The 12th Planet)