Posted on 05/07/2007 7:17:22 PM PDT by blam
Aborigines came out of Africa, study shows
By Roger Highfield, Science Editor
Last Updated: 2:24am BST 08/05/2007
Australia's Aborigines were formed from a single group of migrants who left Africa about 55,000 years ago, DNA evidence suggests.
Once there the settlers evolved in relative isolation, developing genetic characteristics not found anywhere else and leading to unusual fossil finds that threatened the "out of Africa" hypothesis of human origins.
DNA tests show that Aborigines did not develop separately but were part of the migration from Africa 55,000 years ago
However, research published today confirms that all modern humans stem from a single group of Homo sapiens who emigrated from Africa and spread throughout Eurasia.
A report by a team led by Cambridge and Anglia Ruskin Universities published in the Proceedings of the National Academy of Sciences says Australia's Aboriginal population sprang from the same tiny group of settlers. This group replaced early kinds of humans -such as Neanderthals and Homo erectus, who had already colonised Australia - rather than interbreeding with them.
To trace ancestry back 50,000 years or more the team analysed the mitochondrial DNA and Y chromosome DNA, which is only passed down the male line of Aboriginal Australians and Melanesians from New Guinea.
This data was compared with DNA patterns associated with early humans in an international effort with researchers in Oxford, California, and Estonia.
Dr Peter Forster, a geneticist who led the research, said: "For the first time, this evidence gives us a genetic link showing that the Australian Aboriginal and New Guinean populations are descended directly from the same specific group of people who emerged from the African migration."
At the time of the migration, Australia and New Guinea were joined by a land bridge and the region was only separated from the main Eurasian land mass by narrow straits such as Wallace's Line in Indonesia. The land bridge was submerged about 8,000 years ago.
Dr Toomas Kivisild, from Cambridge, co-author of the report, said: "The evidence points to relative isolation after the initial arrival, which would mean any significant developments in skeletal form and tool use were not influenced by outside sources."
“Asians appear to be the most advanced IMHO”
China has the record for “Most Stagnant Civilization Ever”.
You are mixing up several different concepts.
Try viewing this link: Journey of Mankind.
I think this might help. Pay particular attention to the timeline.
Damn, I thought his great-grandmother was Dutch. Oh well, whaddya know.
Maybe.
Presently I subscribe to this theory:
Yep, and scientists have even found a warming climate on Triton, which is one of Neptune’s moons. Somebody should wake Al Gore and warn him.
http://www.scienceagogo.com/news/19980526052143data_trunc_sys.shtml
This was covered in I think a Nova where they showed that the most ancient markers on the Y chromosome occurred in the Klickitat(sp?) people of Africa and the Australian aborigines.
They also covered some interesting findings of very, very ancient fire pits in Australia.
You know, like twenty pound giant birds wings and stuff from some of the megafauna that was there.
Hey, kid, throw a lasso around one of them giant bird legs and drag it over here! Woman, get me a beer!
“such as Neanderthals and Homo erectus, who had already colonised Australia”
how are these earlier humans believed to have reached australia?
I recently saw some show on the Discovery channel about the melting of the last ice age. Some scientist had concocted a theory that great amounts of CO2 had melted the immense ice sheets. Of course they were trying to imply what would happen now because of increased CO2.
What was neglected curiously enough was how the two mile high ice sheets were created in the first place. My college courses had taught us the Milankovich theory of "tilt, wobble, and stretch" whereby the sun was responsible for the heating and cooling of the earth depending on our variations in our orbit. Apparently to these scientists the sun has had a neglible affect on our climate. I suppose cavemen getting rid of their SUVs and lowering the CO2 created the ice ages. (smirk)
I would assume that many people are uncomfortable with the out of Africa theory although to me that is the most plausible one. Of course many want to believe in the theory of God putting humans on different continents. One time I pointed out the difference in skin color tones as you went north from mid-Africa to Scandinavia to a very light-skinned friend and that his ancient ancestors were all probably much darker than he was. He was less than enthusiastic about that idea. My own belief is that if you go back far enough, no matter how pale some of us look, our ancient ancestors were all very dark-skinned. Adaptation is the history of the human race.
It reminds me of a similar description in a publication from the latter half of the 1800’s from, I believe, Thomas Henry Huxley (at least that was the last book I was looking at). In that book, modern blacks descended from gorillas, asians from orangutans, and whites from chimpanzees. I was at a school that had recently been given the entire library of another school that had been around for a long, long time. It contained first or early editions of theological and evolutionary texts from the 19th century and earlier. I remember at the time thinking how absolutely cool it was that I was able to hold these original volumes in my hand and see what folks from that era actually said instead of seeing them merely quoted by others much later.
Water
The Austro-Asiatic linguistic family, which is considered to be the oldest of all the families in India, has a substantial presence in Southeast Asia. However, the possibility of any genetic link among the linguistic sub-families of the Indian Austro-Asiatics on the one hand and between the Indian and the Southeast Asian Austro-Asiatics on the other has not been explored till now. Therefore, to trace the origin and historic expansion of Austro-Asiatic groups of India, we analysed Y-chromosome SNP and STR data of the 1222 individuals from 25 Indian populations, covering all the three branches of Austro-Asiatic tribes, viz. Mundari, Khasi-Khmuic and Mon-Khmer, along with the previously published data on 214 relevant populations from Asia and Oceania.
Map showing present-day distribution of Austro-Asiatic groups and the schematic representation of the routes of migration of the different Austro-Asiatic linguistic subgroups of India.
The Orang Asli of Malaysia have the oldest DNA on earth.
Also, the Maori's of NZ have an interesting DNA combination. The female line is from Melanisians while the male appears to be from the Lapita. Different races. Some believe the Lapita are descended from the Jomon/Ainu (A Caucasian like group).
Thanks, it seems that the warriors leave their females at home when they are out exploring the deep universe.
There were Neanderthals in Australia???
Still are, only now we call them rugby players.
Atlantis sunk.
Excellent. Thank you very much. I understand that the tracings of DNA made this depiction of man’s journey possible?
The Journey of Mankind is based almost entirely on DNA studies.
Although its only a couple of years old, some of the findings presented in the Journey of Mankind are already in need of updating.
The field is still young, changing very quickly, and there will be many more major discoveries to come.
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