Pre-Columbian era (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pre-Columbian era" in English language version.

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archive.org

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books.google.com

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cervantesvirtual.com

  • Durán, D. Historia de las Indias de Nueva España e islas de Tierra Firme [2]

cyberwest.com

discovery.com

dsc.discovery.com

  • Viegas, Jennifer. "First Americans Endured 20,000-Year Layover". Discovery News. Archived from the original on March 13, 2012. Archaeological evidence, in fact, recognizes that people started to leave Beringia for the New World around 40,000 years ago, but rapid expansion into North America didn't occur until about 15,000 years ago, when the ice had literally broken

doi.org

genebase.com

  • Tymchuk, Wendy (2008). "Learn about Y-DNA Haplogroup Q-M242". Genebase Systems. Archived from the original on June 22, 2010. Haplogroups are defined by unique mutation events such as single nucleotide polymorphisms, or SNPs. These SNPs mark the branch of a haplogroup, and indicate that all descendants of that haplogroup at one time shared a common ancestor. The Y-DNA SNP mutations were passed from father to son over thousands of years. Over time, additional SNPs occur within a haplogroup, leading to new lineages. These new lineages are considered subclades of the haplogroup. Each time a new mutation occurs, there is a new branch in the haplogroup, and therefore a new subclade. Haplogroup Q, possibly the youngest of the 20 Y-chromosome haplogroups, originated with the SNP mutation M242 in a man from Haplogroup P that likely lived in Siberia approximately 15,000 to 20,000 years before present

ghostarchive.org

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nih.gov

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tripline.net

  • "Early European Settlements in North America". Tripline. Retrieved 2017-05-06.

umn.edu

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