From: Mermaid (hidden@lucifer.com)
Date: Mon Feb 02 2004 - 23:50:14 MST
[quote from: DrSebby on 2004-02-02 at 14:16:06]
...even if 200,000 yrs is the number, how would that give time for australia
to drift away from southeast asia? could it be that semi-men trecked off
earlier? neanderthals? what accounts for the australoids?
[Mermaid]acc to the continental drift theory, several hundreds of millions of years ago, africa, asia and australia were all a single landmass. the broken pieces of pangea started drifting away much earlier than 200k years. the distances between the continents in our present day would probably be greatly exaggerating numbers in those migratory times.
http://www.handprint.com/LS/ANC/disp.html
Around 120,000 years ago Homo sapiens emerged as a new species, most likely in central East Africa, and from there migrated into the Middle East, south Africa, Europe, central Asia, and finally into the New World. To reach the Bering Strait from Africa by 14,000 years ago, humans would have had to wander no more than one mile every eight years. -- The timing of Ice Age coolings, and the amount they lowered ocean levels, specifies the geologic periods in which it was possible to migrate to land masses otherwise separated by water.
there have been some claims that australoids are the surviving remanants of neaderthals...however...
http://www.neanderthal-modern.com/
One theory posits that modern humans arose as early as 200,000 years ago in Africa, then spread to the Near East, and then colonized the rest of the Old World. This "Out-of Africa" theory claims that these early modern Africans replaced all indigenous populations of archaic humans, including the Neanderthals, by about 30,000 years ago and that all people living today are descended from these Africans. Support for this theory comes from the fact that fossils of modern humans from Africa and the Near East are much older than those found elsewhere. These fossils are 100,000 to 120,000 years old, and some may be even older. This is long before the period 30,000 to 40,000 years ago when modern humans began appearing in other regions. These early modern Africans and Near Easterners could therefore have served as source populations for subsequent migrations of modern humans.
[...]
The multiregional theory finds further support from a recent study in which scientists extracted DNA from cell mitochondria from the bones of an early modern human who lived at least 40,000 years ago in Australia (see Ancient DNA web page). This individual's DNA, like that of the Neanderthals', differs significantly from our own. His DNA sequence is more primitive than the DNA sequences which, according to the calculations of Out-of-Africa theorists, must have existed in the early modern Africans who were supposedly our ancestors. These findings both decrease the genetic divide between Neanderthals and early modern humans and increase the likelihood that early modern humans outside Africa had non-African roots. All of this makes it more likely that Neanderthals and other archaic non-Africans were among the ancestors of modern humans.
and more recently in the news: http://story.news.yahoo.com/news?tmpl=story&u=/nm/20040127/sc_nm/science_neanderthals_dc_1
New York University paleoanthropologist Katerina Harvati said Neanderthals should be considered a separate species from Homo sapiens, and not just a sub-species.
"We interpret the evidence presented here as supporting the view that Neanderthals represent an extinct human species and therefore refute the regional continuity model for Europe," she and colleagues wrote in the Proceedings of the National Academy of Sciences (news - web sites).
Some anthropologists believe that Neanderthals, who went extinct 30,000 years ago, may have at least contributed to the ancestry of modern Europeans.
There is strong evidence that Homo sapiens neanderthalis, as they are known scientifically, interacted with the more modern Cro-Magnons, who eventually displaced them. Cro-Magnons are the ancestors of modern humans, Homo sapiens sapiens.
and
http://story.news.yahoo.com/news?tmpl=story&u=/ap/20040127/ap_on_sc/not_neanderthal_50
The study found that the differences measured between humans and Neanderthals were significantly greater than those found between subspecies of any single group, indicating Neanderthals were not a subspecies of humans. In addition, the difference was as great or greater than that found between closely related primate species, such as humans, gorillas and chimpanzees.
[...]
But a study published in 2002 suggested that the genes of people today carry vestiges of genes of Neanderthals and other extinct branches of the human family.
That report by population biologist Alan R. Templeton of Washington University in St. Louis suggests there were at least two distinct human migrations out of Africa, the first between 420,000 and 840,000 years ago and the second between 80,000 and 150,000 years ago.
According to Templeton, the most recent migration, and perhaps both, were not "replacement events." Rather, he said DNA evidence shows evidence of interbreeding.
I am still googling for more info...
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