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23-Dec-2019 08:45

The pre-LGM warm cycles in Arctic Siberia saw flourishes of megafaunas.

Estimates of a fully ice-free coast range between 16k While most of the archaeological community is in general agreement that the Americas were settled by migrants from northeastern Asian populations, the chronology of the migrations, the source populations that contributed to the migrations, and their migration routes remain uncertain.Models of molecular evolution rates are used to estimate the ages at which Native American DNA lineages branched off from their parent lineages in Asia and to deduce the ages of demographic events.One model based on Native American mt DNA Haplotypes (Figure 2) proposes that migration into Beringia occurred between 30k and 25k cal years BP, with migration into the Americas occurring around 10k to 15k years after isolation of the small founding population.Diverse, though not necessarily plentiful, megafaunas were present in those environments.Herb tundra dominated during the LGM, due to cold and dry conditions.

Estimates of a fully ice-free coast range between 16k While most of the archaeological community is in general agreement that the Americas were settled by migrants from northeastern Asian populations, the chronology of the migrations, the source populations that contributed to the migrations, and their migration routes remain uncertain.Models of molecular evolution rates are used to estimate the ages at which Native American DNA lineages branched off from their parent lineages in Asia and to deduce the ages of demographic events.One model based on Native American mt DNA Haplotypes (Figure 2) proposes that migration into Beringia occurred between 30k and 25k cal years BP, with migration into the Americas occurring around 10k to 15k years after isolation of the small founding population.Diverse, though not necessarily plentiful, megafaunas were present in those environments.Herb tundra dominated during the LGM, due to cold and dry conditions.Alpine glaciers in the coastal ranges and the Alaskan Peninsula isolated the interior of Beringia from the Pacific coast.