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en.wikipedia.org/wiki/Indigenous_peoples_of_the_Americas

The Laurentide Ice Sheet covered most of North America, blocking nomadic inhabitants and confining them to Alaska (East Beringia) for thousands of years. Indigenous genetic studies suggest that the first inhabitants of the Americas share a single ancestral population, one that developed in isolation, conjectured to be Beringia.

www.bbc.com/earth/story/20170328-the-first-people-who-populated-the-americas

For decades, stone tools left by the Clovis people have been found throughout North America. Some date to as early as 13,000 years ago. Some date to as early as 13,000 years ago. This might ...

courses.lumenlearning.com/.../chapter/early-inhabitants-of-the-americas

During this period, early inhabitants are believed to have traversed the ice into what is now North America. The traditional theory has been that these early migrants moved into the Beringia land bridge between eastern Siberia and present-day Alaska around 11,000 to 25,000 years ago.

en.wikipedia.org/wiki/History_of_North_America

History of North America encompasses the past developments of people populating the continent of North America.While it was widely believed that continent first became a human habitat when people migrated across the Bering Sea 40,000 to 17,000 years ago, recent discoveries may have pushed those estimates back at least another 90,000 years. Regardless, migrants settled in many locations on the ...

www.theatlantic.com/science/archive/2017/10/a-brief-history-of-everyone-who...

A comprehensive genetic picture of the people of postcolonial North America was revealed at the beginning of 2017, drawn from data submitted by paying customers to the genealogy company AncestryDNA.

www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=aa78

About 350 people land with their animals. The colony survives four centuries in this inhospitable climate; eventually Greenland is abandoned in the early 15th century. Meanwhile, in the very earliest years of Greenland, an outpost settlement is briefly established in north America. Vinland: c.1000 - 1013

www.nytimes.com/2017/04/26/science/prehistoric-humans-north-america-california...

Humans Lived in North America 130,000 Years Ago, Study Claims. ... The earliest widely accepted evidence of people in the Americas is less than 15,000 years old. Genetic studies strongly support ...

www.history.com/.../new-study-refutes-theory-of-how-humans-populated-north-america

Archaeological studies have found that human colonization of North America by the so-called Clovis culture dates back more than 13,000 years ago, and recent archaeological evidence suggests that ...

www.nationalgeographic.com/news/2018/06/when-and-how-did-the-first-americans...

The first arrivals keep getting older and older because we’re finding more evidence as time goes on. Right now we can solidly say that people were across the Americas by 15,000 years ago.

www.jiskha.com/questions/1757282/which-theory-do-most-scientists-believe-about...

Which theory do most scientists believe about the first inhabitants of North America? A. They walked across the frozen Bering Land Bridge. B. They swam across the Pacific Ocean. C. They sailed across the Atlantic Ocean.---------- D. They walked across the frozen Hudson Bay Bridge. Which of the following reasons best explains why American Indians in the Arctic built igloos? A. to provide shade ...