Arab Today, arab today ancient bone appears to upend how the americas populated
Last Updated : GMT 23:11:59
Arab Today, arab today
Arab Today, arab today

Dated precisely to 13,800 years ago

Ancient bone appears to up-end how the Americas populated

Arab Today, arab today

Arab Today, arab today Ancient bone appears to up-end how the Americas populated

An ancient bone
London - Arabstoday

An ancient bone An ancient bone with a projectile point lodged within it appears to up-end - once and for all - a long-held idea of how the Americas were first populated. The rib, from a tusked beast known as a mastodon, has been dated precisely to 13,800 years ago.
This places it before the so-called Clovis hunters, who many academics had argued were the North American continent\'s original inhabitants.
News of the dating results is reported in Science magazine.
In truth, the \"Clovis first\" model, which holds to the idea that America\'s original human population swept across a land-bridge from Siberia some 13,000 years ago, has looked untenable for some time.
A succession of archaeological finds right across the United States and northern Mexico have indicated there was human activity much earlier than this - perhaps as early as 15-16,000 years ago.
The mastodon rib, however, really leaves the once cherished model with nowhere to go.
The specimen has actually been known about for more than 30 years. It is plainly from an old male animal that had been attacked with some kind of weaponry.
It was found in the late 1970s near Manis, just north of Seattle, in Washington State.
Although scientists at the time correctly identified the specimen\'s antiquity, adherents to the Clovis-first model questioned the dating and interpretation of the site.
To try to settle any lingering uncertainty, Prof Michael Waters of Texas A&M University and colleagues called upon a range of up-to-date analytical tools and revisited the specimen.
These investigations included new radio carbon tests using atomic accelerators.
\"The beauty of atomic accelerators is that you can date very small samples and also very chemically pure samples,\" Prof Waters told BBC News.
\"We extracted specific amino acids from the collagen in the bone and dated those, and yielded dates 13,800 years ago, plus or minus 20 years. That\'s very precise.\"
Computed tomography, which creates exquisite 3D X-ray images of objects, was also used to study the embedded point. The visualisation reveals how the projectile end had been deliberately sharpened to give a needle-like quality. And it also enabled the scientists to estimate the projectile end\'s likely original size - at least 27cm long, they believe.
\"The other thing that\'s really interesting is that as it went in, the very tip broke and rotated off to the side,\" said the Texas A&M researcher.
\"That\'s a very common breakage pattern when any kind of projectile hits bone. You see it even in stone projectiles that are embedded in, say, bison bones.\"
DNA investigation also threw up a remarkable irony - the point itself was made from mastodon bone, proving that the people who fashioned it were systematically hunting or scavenging animal bones to make their tools.
The timing of humanity\'s presence in North America is important because it plays into the debate over why so many great beasts from the end of the last Ice Age in that quarter of the globe went extinct.
Not just mastodons, but woolly mammoths, sabre-toothed cats, giant sloths, camels, and teratorns (predatory birds with a nearly four-metre wingspan) - all disappeared in short order a little over 12,700 years ago.
A rapidly changing climate in North America is assumed to have played a key role - as is the sophisticated stone-tool weaponry used by the Clovis hunters. But the fact that there are also humans with effective bone and antler killing technologies present in North America deeper in time suggests the hunting pressure on these animals may have been even greater than previously thought.
\"Humans clearly had a role in these extinctions and by the time the Clovis technology turns up at 13,000 years ago - that\'s the end. They finished them off,\" said Prof Waters.
\"You know, the Clovis-first model has been dying for some time,\" he finished. \"But there\'s nothing harder to change than a paradigm, than long-standing thinking. When Clovis-First was first proposed, it was a very elegant model but it\'s time to move on, and most of the archaeological community is doing just that.\"

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

Arab Today, arab today ancient bone appears to upend how the americas populated Arab Today, arab today ancient bone appears to upend how the americas populated

 



Arab Today, arab today
Arab Today, arab today Tourism shows signs of recovery

GMT 09:59 2017 Monday ,20 February

Tourism shows signs of recovery
Arab Today, arab today Sarah Belamesh designs antiques of "ceramic"

GMT 19:45 2017 Monday ,20 February

Sarah Belamesh designs antiques of "ceramic"
Arab Today, arab today Top Yemen commander killed

GMT 09:55 2017 Wednesday ,22 February

Top Yemen commander killed
Arab Today, arab today Media host Mona Iraqi stresses her show's success

GMT 15:32 2017 Wednesday ,22 February

Media host Mona Iraqi stresses her show's success
View News in Arabic - Culture: أخبار ثقافة
Arab Today, arab today
Arab Today, arab today
Arab Today, arab today To hold social dialogue over secondary school

GMT 07:43 2017 Wednesday ,22 February

To hold social dialogue over secondary school
Arab Today, arab today 63-Year-Old Woman Delivers Baby

GMT 12:35 2017 Tuesday ,21 February

63-Year-Old Woman Delivers Baby
Arab Today, arab today Milan laughs while Rome cries

GMT 10:28 2017 Wednesday ,22 February

Milan laughs while Rome cries
Arab Today, arab today Pluto's unruly moons

GMT 06:31 2015 Thursday ,04 June

Pluto's unruly moons
Arab Today, arab today Nissan enhances sales in most markets

GMT 14:08 2017 Monday ,20 February

Nissan enhances sales in most markets
Arab Today, arab today Competes Sweden and Germans by S90

GMT 22:36 2017 Thursday ,16 February

Competes Sweden and Germans by S90
Arab Today, arab today Janat pleased for issuing 'Good Morning'

GMT 06:41 2017 Monday ,20 February

Janat pleased for issuing 'Good Morning'
Arab Today, arab today Small ponds have outsized impact

GMT 15:53 2017 Tuesday ,21 February

Small ponds have outsized impact

GMT 06:34 2017 Sunday ,19 February

Ahmed Fahmy stresses he did not ignore singing

GMT 06:50 2017 Wednesday ,15 February

Tragic fluctuations of Bakhtiari's life revealed

GMT 14:29 2017 Monday ,20 February

Prepares to present her new collection

GMT 14:06 2017 Friday ,17 February

London to tax old cars

GMT 23:29 2017 Thursday ,16 February

Home built on sand castles-style costs $8m

GMT 05:15 2017 Tuesday ,21 February

Omega 3 can reduce asthma cases

GMT 19:16 2017 Friday ,17 February

Aziz House ready to host the tourists

GMT 13:12 2015 Saturday ,09 May

Sheikh Sultan opens Sharjah Centre

GMT 12:39 2017 Monday ,20 February

newest smartphone another winner for Huawei

GMT 19:10 2017 Friday ,17 February

Hats, scarves add beauty to women
Arab Today, arab today
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube
arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday