'After a detailed DNA analysis of the genomes of more than 800 Polynesians and Native Americans, both modern and prehistoric, researchers have found evidence of contact between the two groups as far back as 1200 CE...
"Our analyses suggest strongly that a single contact event occurred in eastern Polynesia, before the settlement of Rapa Nui, between Polynesian individuals and a Native American group most closely related to the indigenous inhabitants of present-day Colombia," the researchers explain in their paper.
https://www.sciencealert.com/new-evidence-shows-prehistoric-contact-between-native-americans-and-polynesians
See also this article from 2017, reporting a study supporting the theory that the Native American / Polynesian interbreeding occurred before the colonisation of Rapa Nui:
https://www.sciencemag.org/news/2017/10/did-early-easter-islanders-sail-south-america-europeans
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