Editing Pre-Columbian transoceanic contact theories (section)

== Population Y ==
A 2015 study found some Indigenous American groups, particularly those in the Amazon, carry a small admixture (around 1-2% of the genome) related to groups in Southeast Asia and Australasia like [[Andamanese peoples]], [[Indigenous Australians]], [[Indigenous people of New Guinea|Papuans]] and the [[Lumad#Mamanwa|Mamanwa]] people of the Philippines. This ancestry component has been dubbed "Population Y". Some authors have suggested that this reflects a trans-Pacific migration, but scholars have suggested that this more likely reflects genetic heterogeneity in the initial founding population of Native Americans present in [[Beringia]], only some of which carried the "Population Y" ancestry. It has also been noted that a 40,000 year old individual from [[Tianyuan Cave]] in northern China also carries this ancestry, making it more likely that this ancestry was the result of contact in Eurasia, prior to the arrival of the ancestors of Native Americans in Beringia.<ref name=":1">Jennifer A. Raff [http://onlinedigeditions.com/publication/?m=16146&i=634462&view=articleBrowser&article_id=3531892&ver=html5 "Y Not a Pacific Migration? Misunderstandings of Genetics in Service of Pseudoscience]" ''The SAA Archaeological Record'' NOVEMBER 2019 - Volume 19 Number 5</ref>