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posted by janrinok on Friday September 30 2016, @02:05PM   Printer-friendly
from the not-glamping dept.

For more than a decade, evidence has been piling up that humans colonized the Americas thousands of years before the Clovis people. The Clovis, who are the early ancestors of today's Native Americans, left abundant evidence of their lives behind in the form of tools and graves. But the mysterious pre-Clovis humans, who likely arrived 17,000 to 15,000 years ago, have left only a few dozen sources of evidence for their existence across the Americas, mostly at campsites where they processed animals during hunting trips. Now a fresh examination of one such campsite, a 14,000-year-old hunter's rest stop outside the city of Tres Arroyos in Argentina, has given us a new understanding of how the pre-Clovis people might have lived.

These early settlers were hunter-gatherers who used stone tools for a wide range of activities, including hunting, butchery, scraping hides, preparing food, and making other tools out of bone and wood. Many of the pre-Clovis stone tools look fairly simple and were made by using one stone to flake pieces off the other, thus creating sharp edges. At the campsite in Argentina, known as the Arroyo Seco 2 site, archaeologists have found more than 50 such tools made from materials like chert and quartzite. They're scattered across an area that was once a grassy knoll above a deep lake, which is rich with thousands of animal bone fragments that have been carbon dated to as early as 14,000 years ago. There are even a couple-dozen human burials at the site, dated to a later period starting roughly 9,000 years ago. The spot has the characteristic look of a hunter's camp, used for processing animals, that was revisited seasonally for thousands of years.

[Continues...]

One question remains. How can we be sure the tools at the site really are 14,000 years old? Archaeologists infer some of this from carbon dates on the animal bones, which have been tested by several labs around the world. The problem is that the site's stratigraphy, or historical layers, are difficult to read due to erosion at the site. So even if a tool appears right next to a bone in a given layer, it may have come from later and been moved around by wind and water. That said, there is evidence that some of the early bones were broken by stone tools. A 14,000-year-old bone from Equus neogeus, an extinct American horse, bears distinct marks from a hammerstone. "This bone was intentionally broken while still fresh," note the researchers.

With a firm connection between the human tools and the animal bones found at Arroyo Seco, we can begin to piece together what everyday life was like for these peopleā€”at least at mealtime. Analysis of more than 600 bone fragments out of thousands found at the site revealed that a large amount of these people's meat came from animals that no longer exist. Various extinct horse species were a major part of the pre-Clovis diet, as were other extinct mammals like giant ground sloths, camels, mammoths, and giant armadillos. [...] That said, Arroyo Seco contains far more bones from guanaco (a local relative of the camel) and rodents than it does from extinct mammals.

PLoS One, 2016. DOI: 10.1371/journal.pone.0162870


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  • (Score: 2) by Runaway1956 on Saturday October 01 2016, @01:11AM

    by Runaway1956 (2926) Subscriber Badge on Saturday October 01 2016, @01:11AM (#408605) Journal

    We touched on this subject recently. The difference between the races of men is the same as the difference between subspecies of other animals. A German Shepard is genetically almost the same as a grayhound, but they sure look different.

    The question I responded to asked about the appearance of the people in the story. If you don't see any difference in the appearance of the peoples that I have mentioned, then your eyesight is in question.

    Do you look just like your parents, your grandparents, your great grandparents? Are all of you indistinguishable? Or, is it you who is talking out your ass, in a gesture toward political correctness? Personally, I refuse to mindlessly follow some PC dictate, when my own eyes tell me that the dictate is bullshit.

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  • (Score: 2) by NotSanguine on Saturday October 01 2016, @07:17AM

    by NotSanguine (285) <NotSanguineNO@SPAMSoylentNews.Org> on Saturday October 01 2016, @07:17AM (#408676) Homepage Journal

    Personally, I refuse to mindlessly follow some PC dictate,

    I'm not telling you what to say, or chastising you for breaking some bullshit speech code.

    Say whatever you want, it's no skin off my nose.

    I will do the same. And I did. I didn't expect you to agree with me, and don't care if you do.

    That's how it is (and should be) in The Marketplace of Ideas [wikipedia.org].

    --
    No, no, you're not thinking; you're just being logical. --Niels Bohr