QUOTE (cyberchina @ Sep 17 2009, 04:02 AM)

That's because they were the same continent before asia and america split...
...The inuit language is different from the tungusic people of outer manchuria.
QUOTE (JaM @ Sep 16 2009, 11:32 PM)

...The question is, did the same thing happen earlier? Some studies seems to suggest that there was a small earlier back migration, but that those people migrated to the Americas later, so their descendants don't live in Asia any more, and that the early peoples of NE Asia were somehow isolated for a long period, even before migration to the Americas. The different recent studies doesn't seem to correlate too well, so surely nothing is 100% certain.
The contentints were seperated 13ky+ ago. WIth this king of the long seperation, two groups supposedly won't be able to share the near identical life style, same tools, moreover, the communicatable language.
Actually Inuits did not originate from the Bering Strait, but 1st appeared at the tie point of Aleutian Island and Alaska mainland. They migrated northwards, reached the Bering Strait, then swept out Paleo-Eskimo Dorsets and reached Greenland just just within a few hundred years. At the time of their arrival at Greenland, there were a mini arctic ice age. That enabled Inuits to move southward in greenland and Northern Canada in 13 century, encounted Northern European's colony in Greenland and possible in Canada, and annihilate them.
So during this mini ice age, the Bering Strait should be frozen, and larger scale migrations to Asia Mainland were all possible.
Acutal Autosomal Chromosome analysis shown that in Actic Asia, more than 50% of the genetic contribution were from North America. The corridor of costal Siberia, Japan, and Taiwan, whose populations have the highest percentage of North American genetic contribution.
See:
--Arctic region -
http://konglong.5d6d.com/userdirs/8/6/kong...30a29c589d2.png......The primary North American Indian genetic contribution identified for the Arctic region may indicate gene flow from Alaska to Siberia. This would reverse the usual scholarly presumption that North American populations have been only a recipient of Asian immigrants and not a source of American Indian emigrants to Asia. To explore this connection with North America further, a reciprocal analysis was performed.
--Japanese North American Gene Contribution -
http://konglong.5d6d.com/userdirs/8/6/kong...bedace6ef75.jpg--Taiwan Native Atayal N American Gene COntribution -
http://konglong.5d6d.com/userdirs/8/6/kong...0bfcd8f344d.pngI think the research on the pre-Columbus modern time Bering Strait human migration is blocked due to some political reasons.