Prehistoric population expansion in Central Asia promoted by the Altai Holocene Climatic Optimum.

Both the latitudinal and altitudinal distribution of the numbers of radiocarbon dates from archeological sites during 6.5–3.6 kyr, especially after 5 kyr, show an increasing trend in the Altai-Sayan and surrounding regions (Fig. 4g–i ), indicating increased human migration and population expansion in this region under the more favorable environmental conditions.

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