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Title: Ancient DNA analysis sheds light on the early peopling of South America by Florida Atlantic University
Source: [None]
URL Source: https://phys.org/news/2022-11-ancie ... a-analysis-early-peopling.html
Published: Nov 2, 2022
Author: staff
Post Date: 2022-11-02 16:45:06 by Ada
Keywords: None
Views: 44
Comments: 2

The figure depicts the deep ancestries of the ancient individuals of the Americas and archaic ancestry in ancient South America and Panama. The pie chart radius reflects the proportion of shared archaic ancestry in the individual. Credit: Florida Atlantic University The Americas were the last continent to be inhabited by humans. An increasing body of archaeological and genomic evidence has hinted to a complex settlement process. This is especially true for South America, where unexpected ancestral signals have raised perplexing scenarios for the early migrations into different regions of the continent.

Many unanswered questions still persist, such as whether the first humans migrated south along the Pacific coast or by some other route. While there is archaeological evidence for a north-to-south migration during the initial peopling of the Americas by ancient Indigenous peoples, where these ancient humans went after they arrived has remained elusive.

Using DNA from two ancient human individuals unearthed in two different archaeological sites in northeast Brazil—Pedra do Tubarão and Alcobaça— and powerful algorithms and genomic analyses, Florida Atlantic University researchers in collaboration with Emory University have unraveled the deep demographic history of South America at the regional level with some unexpected and surprising results.

Not only do researchers provide new genetic evidence supporting existing archaeological data of the north-to-south migration toward South America, they also have discovered migrations in the opposite direction along the Atlantic coast—for the first time. The work provides the most complete genetic evidence to date for complex ancient Central and South American migration routes.

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#1. To: All, NeoconsNailed (#0)

"There is an entire Pacific Ocean between Australasia and the Americas, and we still don't know how these ancestral genomic signals appeared in Central and South America without leaving traces in North America," said Andre Luiz Campelo dos Santos, Ph.D., first author, an archaeologist and a postdoctoral fellow in FAU's Department of Electrical Engineering and Computer Science.

To further add to the existing complexity, researchers also detected greater Denisovan than Neanderthal ancestry in ancient Uruguay and Panama individuals. Denisovans are a group of extinct humans first identified from DNA sequences from the tip of finger bone discovered around 2008.

We've discussed this previously

Ada  posted on  2022-11-02   16:57:38 ET  Reply   Trace   Private Reply  


#2. To: Ada (#1)

Yes -- and as usual I wish them luck with their prolly impossible task of establishing a linear history ("The Americas were the last continent to be inhabited by humans" etc). Only a matter of time till they penetrate some LatAm jungle where they find 'proof' that people settled the entire world from there, right? ;)

Never mind the jungles. How many more Göbekli Tepe-style revelations are lurking underground worldwide?

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USA! USA! USA! Bringing you democracy, or else! there were strains of VD that were incurable, and they were first found in the Philippines and then transmitted to the Korean working girls via US military. The 'incurables' we were told were first taken back to a military hospital in the Philippines to quietly die. – 4um

NeoconsNailed  posted on  2022-11-04   3:30:28 ET  Reply   Trace   Private Reply  


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