Southeast Asia was crowded with archaic human groups long before we turned up

Phys.org ^ | July 15, 2019 | João Teixeira, The Conversation

[SunkenCiv]

In new research published in Proceedings of the National Academy of Sciences, we detail how during this remarkable journey the ancestors of modern humans met and genetically mixed with a number of archaic human groups, including Neandertals and Denisovans, and several others for which we currently have no name. The traces of these interactions are still preserved in our genomes.

For example, all modern non-African populations contain about 2 percent Neandertal ancestry. This strong universal signal shows that the original Neandertal mixing event must have happened just after the small founding population left Africa.

We can even use the Neandertal genetic signal to date when they left Africa. The large size of Neandertal DNA fragments in the genome of an ancient skeleton from southern Russia, which is 45,000 years old, shows that at most 230-430 generations could have passed since the initial mixing event (dating it around 50-55,000 years ago).

By analyzing where the archaic genetic traces are found today (from previous genetic studies) and using paleovegetation maps that identify favorable savannah-like habitat along the route 55,000 years ago, we have reconstructed the likely geographic locations and number of the archaic hominin mixing events.

[SunkenCiv]

A map showing where the ancestors of modern humans appear to have met and mixed with archaic hominins. Author provided [João Teixeira]

[SunkenCiv]

...all modern non-African populations contain about 2 percent Neandertal ancestry. This strong universal signal shows that the original Neandertal mixing event must have happened just after the small founding population left Africa.

No it doesn't -- it's more obviously parsimonious to claim that the Neandertals were all over the Earth except perhaps in Africa, or that most of the Earth's population has a Neandertal base (which is true, it's in the DNA) and drove the competing human variety into Africa, or, Africa was uninhabitable for long while and was the last area to be repopulated after the glaciation.

[SunkenCiv]

KEYWORDS: neandertal; neandertals; neanderthal; neanderthals

The Neandertal Enigma
by James Shreeve
in local libraries

"Frayer's own reading of the record reveals a number of overlooked traits that clearly and specifically link the Neandertals to the Cro-Magnons. One such trait is the shape of the opening of the nerve canal in the lower jaw, a spot where dentists often give a pain-blocking injection. In many Neandertal, the upper portion of the opening is covered by a broad bony ridge, a curious feature also carried by a significant number of Cro-Magnons. But none of the alleged 'ancestors of us all' fossils from Africa have it, and it is extremely rare in modern people outside Europe." [pp 126-127]

[SunkenCiv]

The large size of Neandertal DNA fragments in the genome of an ancient skeleton from southern Russia, which is 45,000 years old, shows that at most 230-430 generations could have passed since the initial mixing event (dating it around 50-55,000 years ago).

(btw, I'm carrying some of the dead Siberian as well, along with some Denisovan)

[SunkenCiv]

Coming soon to an FR topic near you:

https://mysteriousuniverse.org/2019/07/100000-year-old-denisovan-artwork-discovered-in-china/

https://www.ancient-origins.net/news-history-archaeology/lunar-calendar-0012340

https://www.independent.com.mt/articles/2019-07-24/local-news/Ancient-Maltese-civilisation-felled-most-trees-within-first-100-years-of-arriving-in-Malta-report-6736211303

I’m going to mine GH’s web site more often in the future:

http://Grahamhancock.com/news/

[Cowboy Bob]

I'm confused by these statements. It says that Neanderthals first came from Africa, but there is no Neanderthal DNA in Africans. Were there two separate groups in Africa, who did not commingle?

[SuperLuminal]

I'm confused by these statements. It says that Neanderthals first came from Africa, but there is no Neanderthal DNA in Africans. "

That's a good sign of intelligence... Only a moron or someone thoroughly brain-washed by their government school education would NOT be confused by this pap...

[SunkenCiv]

The conventional view is that earlier "archaic" forms of human (the genus Homo) populated the Earth, and were replaced in Africa by "anatomically modern" humans, Homo Sapiens. As they spread out of Africa, they absorbed and/or replaced every earlier form.

[ProtectOurFreedom]

…all modern non-African populations contain about 2 percent Neandertal ancestry

That can't be right. I just got my 23 and Me results back and they didn't identify any Neanderthal ancestors. But, now that I look back on it, maybe that's what Dad was saying about his in-laws.

…at most 230-430 generations could have passed since the initial mixing event (dating it around 50-55,000 years ago).

"Honest, ma! Becky and I weren't having sex...we were having an initial mixing event."

[SunkenCiv]

In the years before I got my DNA 'done' I was worried that I'd turn out to be related to the corned beef sandwich I'd eaten a couple of hours before the test.

[Cowboy Bob]

The conventional view is that earlier "archaic" forms of human (the genus Homo) populated the Earth, and were replaced in Africa by "anatomically modern" humans, Homo Sapiens.

If I understand correctly, Homo Sapiens originated in Africa. Where did the earlier ("archaic") forms of humans originate. Was it also Africa?

[ProtectOurFreedom]

After all, “you are what you eat.”

[b4me]

my guess near the garden of eden... it would tie in with biblical people like adam and eve, but then a change of people type after the tree incident.

my second guess 1st type of people were pre global flood. 2nd type modern people post flood?

since so much other scientific discoveries tend to prove the bible accurate one might think this some how proves some thing in the bible accurate.

[zeestephen]

Re: Or, Africa was uninhabitable for long while and was the last area to be repopulated after the glaciation.

As far as I know, there was almost no glaciation at all on the African continent during the last ice age.

However, 20,000 years ago, there is evidence of extreme drought in northern Africa and the Arabian peninsula and in southwest Africa during the last glacial maximum.

[oldasrocks]

Al lthis just shows women will sleep with anyone.

[sphinx]

The relationship was probably closer than you’re letting on. ‘Fess up. You’re only pretending it was corned beef, you old Neanderthal....

[Red Badger]

3500 year old pr0n?................................

[Openurmind]

Graham has a tendency to weed out the weak projects designed just for grants and funding and sticks to substantial finds. But at the same time he has a very objective view beyond the official narrative. Unlike most he believes in digging deeper than accepted practice allows, in fact he encourages it.

[Openurmind]

Something we tend to do is not look back far enough. There were three ice ages and four interglacials in the last 350,000 yrs. It happens in a regular cycle approximately every 125k, so since the earliest known Homo erectus find dated to 1.8 million years ago there have been 14 glacial/interglacial periods where migration could have been necessary for survival of hominids.

Each of these could have been associated with migrations north/south again as these cycles came about, and each would have resulted in it’s own post migration evolution depending on location and environment. There were ice ages before the last ice age and we limit our scope of perspective to only the last ice age and it is a mistake, we need to look at the longer time line and consider there were actually 14 of these cycles.

[jpsb]

I’ve never read that the Neanderthal came out of Africa. Certainly the ancestors of Neanderthal had to but not the Neanderthals themselves.

Neanderthals were built for a cold climate not a hot African one.