Researchers from the University of Cambridge, Britain, discovered that climate played an essential role in the period of ancient human migration from Africa, as well as in the ways it followed.
And the journal Nature Communications notes that, according to the researchers, the reason for the non-spread of ancient humans in the world is directly due to the harsh conditions in the Middle East and competition with Neanderthals.
The researchers have reconstructed the climate of the last 300,000 years, taking into account the minimum amount of rain necessary for the life of hunters and gatherers, and in the light of them determined the most favorable periods for ancient Homo sapiens to migrate from Africa.
It became clear to them that the ancient man was able to move to Asia through the isthmus of Sinai and the Bab al-Mandab strait, which was then narrow due to the low level of water in it.
In the first case, periodic opportunities were available 246 and 200 thousand years ago, 130-96 thousand years ago and about 78 thousand years ago. In the second case, people managed to cross the strait even though they did not have sufficient skills in periods from 242 to 275 thousand years ago, and from 182 to 145 thousand years ago. Moreover, about 65,000 years ago, both paths became “open” at the same time.
This assessment is consistent with archaeological and genetic data indicating that over the last 300,000 years Homo sapiens repeatedly attempted to get out of Africa before the last great migration wave, which succeeded about 65,000 years ago.
According to the researchers, the harsh climatic and environmental conditions in the Middle East, especially in the Arabian Peninsula, as well as competition with Neanderthals and possibly with Denisovs, caused the failure of the first attempts to migrate.
Source: linta. Ro
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