No "Lost Tribes" or Aliens: What ancient DNA reveals about American Prehistory

New genetics research settles questions about the peoples of Newfoundland & Labrador – & helps highlight what genetics can’t tell us

The Guardian By Jennifer Raff
14 Feb 2018 16.33 EST

Genetics research has transformed our understanding of human history, particularly in the Americas. The focus of the majority of high profile ancient DNA papers in recent years has been on addressing early events in the initial peopling of the Americas. This research has provided details of this early history that we couldn’t access though the archeological record.

Collectively, genetics studies have shown us that the indigenous inhabitants of the Americas are descended from a group that diverged from its Siberian ancestors beginning sometime around 23,000 years before present & remained isolated in Beringia (the region of land that once connected Siberia & North America) for an extended period of time. When the glaciers covering North America melted enough to make the Pacific coast navigable, southward travel became possible, & patterned genetic diversity across North & South America reflects these early movements.

Recent ancient DNA studies indicate that approximately 13,000 years ago, two clades (genetic groups) of peoples emerged; one exclusively consisting of northern Native Americans, & one consisting of peoples from North, Central, & South America, including the 12,800 year old Anzick child from a Clovis burial site in Montana. All genetics research to date has affirmed the shared ancestry of all ancient & contemporary indigenous peoples of the Americas, & refuted stories about the presence of “lost tribes”, ancient Europeans, & !ancient aliens!

Events that occurred after people first entered the Americas – how they settled in different parts of the continents, adapted to local environments, interacted with each other, & were affected by European colonialism – have received somewhat less attention in the press, but as can be seen in the links above, there have been some very significant research papers published on these topics. One such paper...Genetic Discontinuity between the Maritime Archaic & Beothuk Populations in Newfoundland, Canada by Duggen et al. (2017), explores the genetic diversity within three different ancient groups who lived in Newfoundland & Labrador.

One reason this region is of particular interest is that it’s on the furthest northeastern margin of North America & so was one of the last areas in the Americas to be peopled. It appears to have been occupied successively by three culturally distinct groups beginning about 10,000 years before present (YBP) in Labrador & 6,000 YBP in Newfoundland: the Maritime Archaic, the Paleo-Inuit (also referred to as the Paleo-Eskimo), & the indigenous peoples that Europeans called the Beothuk. Today the region is home to several indigenous groups, including the Inuit, the Innu, the Mi’kmaq & the Southern Inuit of NunatuKavut.

The members of the Maritime Archaic tradition created the oldest known burial mounds in North America (dating to 7,714 YBP) & subsisted upon coastal marine resources. Approximately 3,400 YBP they seem to have abandoned Newfoundland, either in response to the appearance of Paleo-Inuit in the region or because of climate changes. The Paleo-Inuit’s presence on the island overlapped with the peoples referred to as the Beothuk beginning around 2000 YBP. The Beothuk encountered European settlers in 1500 AD, & in response to their presence gradually moved to the interior of the island, where their populations declined.

The last known Beothuk, Shanawdithit, died of tuberculosis in captivity in 1829. Although it remains possible that Beothuk traces of ancestry persist in contemporary residents of NL, including members of the Innu, Mi’kmaq, & European communities, it is generally accepted that the Beothuk became culturally extinct with the death of Shanawdithit.

By analyzing mitochondrial haplogroups (groups of closely related maternal lineages) present within individuals from all three populations, Dugan et al. addressed the question of whether they were genetically similar or whether all three groups were biologically as well as culturally distinct from each other. This happens to be one of the most fundamental questions that arises when studying the past: do cultural changes in the archaeological record of a region represent the arrival of new groups, or did one group of people living in the same region over time adopt new cultural practices & technologies from others?

In the case of Newfoundland, the three groups were genetically distinct; they do not share any maternal haplogroups except for haplogroup X2a, lineages of which were found in both the Maritime Archaic & Beothuk. (The presence of haplogroup X2a in North American populations has sometimes been cited as evidence for European ancestry in ancient Americans...

Apart from that single exception, the Maritime Archaic, Paleo-Inuit, & Beothuk are clearly genetically distinctive from one another. However, it’s important to note that this study was done on mitochondrial DNA, which is exclusively matrilineally inherited, & so we can only say that the three groups were not maternally related. While they indicate that the groups are genetically different from each other, does that mean that there was no shared ancestry between them at all? It’s unclear without looking at the rest of the genome whether, for example, there might have been any paternal lineages shared between the populations...

As this study shows, we can learn a lot about the past by characterizing the genomes of ancient & contemporary peoples. This paper by Duggen et al. adds to decades of study of the genomes from ancient & contemporary peoples of the Americas, which reveals a nuanced picture of their complex & remarkable history of evolution, interaction, & resilience in the face of unbelievable oppression.

But it’s also important to understand what genetics can’t tell us...

All claims that a person’s tribe or indigenous nationality can be determined from their genomes are scientifically inaccurate. First, this is because there simply are no currently known genetic markers that allow us to identify individual tribes or nations; although we see geographically patterned genetic variation throughout the Americas in ancient & contemporary populations which allows us to differentiate them (as done in this study), genetic lineages are not tribal or nation-specific.

More importantly, who is or is not a member of a particular community is determined by indigenous groups’ own standards of belonging, which are often just as much about relations & community ties as they are about biological descent...

Archaeologists Say Humans May Have Come to Texas Earlier Than Previously Thought

1590 North American Atlantic Coast Natives by John White (c1540 – c1593). The village of Pomeiooc (Pomeiock) was a Native America settlement, designated on de Bry’s map of Virginia, Americae Pars Nunc Virginia Dicta, between today’s Wyesocking Bay & Lake Landing, North Carolina. John White designates the settlement as Pomeyoo.

New evidence pushes back previous estimates of arrival by 3,000 years

Texas Standard by Kevin Wheeler
July 20, 2018 2:48 pm| 

In the 1920s, archaeologists dug up a trove of ancient artifacts near Clovis, New Mexico. What humans had known about their past was changed forever. These artifacts were the oldest man-made objects found on the Western Hemisphere, & the discovery led to a theory that the first humans to set foot in the Americas did so around about 13,000 years ago, & that they made & used tools like the ones found near Clovis.

Now a group of archaeologists from Texas State University are offering some of the most convincing evidence yet to challenge this “Clovis First” theory.  They’ve recently discovered about 150,000 artifacts near at the Gault Archaeological Site near Killeen, Texas. What they’ve found could change what we know about the timeline of human history.

Tom Williams is one of the archaeologists who has been working at Gault, & he doesn’t mince words when he talks about the significance of this research.  “It really is changing the paradigm that we currently consider for the earliest human occupation in the Americas,” Williams says.

The search for artifacts older than the Clovis ones began at the Gault site in 2007, & since then, Williams & his team have found about 150,000 technological tools that range from hide-scrapers, to blade cores, which were used to create long knives out of flint, to projectile points.

“These projectile points are particularly interesting because they don’t look like Clovis,” Williams says. “And at the moment they appear to be unique in the archaeological record in the earliest part of prehistory in North America.”

Williams conservatively estimates that these artifacts could be 16,000-20,000 years old, which would put them at about 3,000 years older than any Clovis artifact. The age of the tools found at Gault suggests that humans arrived in North America much earlier than what was previously thought. They’re utterly unique.  “Right now we find no other technology that looks like this assemblage,” Williams says.

For Williams, finds like this illuminate one of archaeology’s great appeals. “One of the things with archaeology is you never know what’s down beneath the earth,” Williams says.

Archaeology Magazine - A publication of the Archaeological Institute of America
Unique Assemblage of Stone Tools Unearthed in Texas

Texas stone tools (Produced by N. Velchoff, The Gault School of Archaeological Research) Killeen, Texas

According to a Texas Standard report, some 150,000 stone artifacts have been found at the Gault archaeological site in central Texas, in the layers below the sediments that contained Clovis artifacts. First discovered in the 1920s in Clovis, New Mexico, Clovis-style tools were thought to have been made by the earliest Americans some 13,000 years ago. The sediments surrounding the newly discovered artifacts were dated with optically simulated luminescence, which measures the amount of time that has lapsed since the sediments were last exposed to heat or sunlight. Archaeologist Tom Willliams of Texas State University said the tests suggest the projectile points in the Gault site’s lower layers are between 16,000 & 20,000 years old. “Right now we find no other technology that looks like this assemblage,” he added. The research team therefore suggests that the people who made Clovis-style tools migrated into a region that already had an established population.

Yaudanchi Creation Story

Tales Around the Campfire -  Robert Hood, designer, and Edward Francis Finden, engraver, Interior of a Cree Indian Tent. March 25th. 1820, 1823 

 Yaudanchi Creation Story

Everything was water except a very small piece of ground. On this were the eagle and the coyote. Then the turtle swam to them. They sent it to dive for the earth at the bottom of the water. The turtle barely succeeded in reaching the bottom and touching it with its foot. When it came up again, all the earth seemed washed out. Coyote looked closely at its nails. At last he found a grain of earth. Then he and the eagle took this and laid it down. From it they made the earth as large as it is. From the earth they also made six men and six women. They sent these out in pairs in different directions and the people separated. After a time the eagle sent the coyote to see what the people were doing. Coyote came back and said: “They are doing something bad. They are eating the earth. One side is already gone.” The eagle said: ” That is bad. Let us make something for them to eat. Let us send the dove to find something.” The dove went out. It found a single grain of meal. The eagle and coyote put this down on the ground. Then the earth became covered with seeds and fruit. Now they told the people to eat these. When the seeds were dry and ripe the people gathered them. Then the people increased and spread all over. But the water is still under the world. 

(From Cabrillo.edu and written by C. Smith)