Models of migration to the New World | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-13

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Settlement_of_the_Americas


00:01:48 1 The environment during the latest Pleistocene
00:02:07 1.1 Emergence and submergence of Beringia
00:03:33 1.2 Glaciers
00:05:42 1.3 Climate and biological environments
00:08:38 1.4 Environmental changes during deglaciation
00:10:40 2 Chronology and sources of migration
00:11:33 2.1 Chronology
00:14:46 2.1.1 Evidence for pre-LGM human presence
00:18:39 2.1.2 Genomic age estimates
00:21:14 2.2 Source populations
00:22:02 2.2.1 Human genomic models
00:26:01 2.2.2 HTLV-1 genomics
00:28:07 2.2.3 Physical anthropology
00:30:56 2.2.4 Stemmed points
00:31:30 3 Migration routes
00:31:39 3.1 Interior route
00:35:21 3.2 Pacific coastal route
00:40:47 3.2.1 East Asians: Paleoindians of the coast
00:42:08 3.2.2 Problems with evaluating coastal migration models
00:43:30 4 Y-DNA among South American and Alaskan natives
00:44:17 5 Other hypotheses



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SUMMARY
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The first settlement of the Americas began when Paleolithic hunter-gatherers first entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum.
These populations expanded south of the Laurentide Ice Sheet and rapidly throughout both North and South America, by 14,000 years ago. The earliest populations in the Americas, before roughly 10,000 years ago, are known as Paleo-Indians.
The peopling of the Americas is a long-standing open question, and while advances in archaeology, Pleistocene geology, physical anthropology, and DNA analysis have shed progressively more light on the subject, significant questions remain unresolved. While there is general agreement that the Americas were first settled from Asia, the pattern of migration, its timing, and the place(s) of origin in Eurasia of the peoples who migrated to the Americas remain unclear.The prevalent migration models outline different time frames for the Asian migration from the Bering Straits  and subsequent dispersal of the founding population throughout the continent. Indigenous peoples of the Americas have been linked to Siberian populations by linguistic factors, the distribution of blood types, and in genetic composition as reflected by molecular data, such as DNA.The "Clovis first theory" refers to the 1950s hypothesis that the Clovis culture represents the earliest human presence in the Americas, beginning about 13,000 years ago; evidence of pre-Clovis cultures has accumulated since 2000, pushing back the possible date of the first peopling of the Americas to about 13,200–15,500 years ago.