John S. Dykes
Posted on 02/05/2012 5:09:30 PM PST by SunkenCiv
For a long time, scientists had assumed a gradual expansion of African people through Sinai into both Europe and Asia. Then, bizarrely, it became clear from both genetics and archaeology that Europe was peopled later (after 40,000 years ago) than Australia (before 50,000 years ago).
Meanwhile, the geneticists were beginning to insist that many Africans and all non-Africans shared closely related DNA sequences that originated only after about 70,000-60,000 years ago in Africa. So a new idea was born, sometimes called the "beachcomber express," in which the first ex-Africans were seashore dwellers who spread rapidly around the coast of the Indian Ocean, showing an unexpected skill at seafaring to reach Australia across a strait that was at least 40 miles wide. The fact that the long-isolated Andaman islanders have genes that diverged from other Asians about 60,000 years ago fits this notion of sudden seaside peopling.
Sea levels were 150 feet lower then, because the cold had locked up so much moisture in northern ice-caps, so not only were most Indonesian islands linked by land, but the Persian Gulf was dry and, crucially, the southern end of the Red Sea was a narrow strait...
The story grew more complicated last year when a team led by Hans Peter Uerpmann of the University of Tübingen in Germany described a set of stone tools found under a rock overhang in eastern Arabia, dating from 125,000 years ago. The tools were comparable to those made by east Africans around the same time. This was when Arabia was wetter than today, but the Red Sea crossing was wider.
(Excerpt) Read more at online.wsj.com ...
John S. Dykes
"For thirty years, nobody disputed this 'fact'. One group of scientists abandoned their experiments on human liver cells because they could only find twenty-three pairs of chromosomes in each cell. Another researcher invented a method of separating the chromosomes, but still he thought he saw twenty-four pairs. It was not until 1955, when an Indonesian named Joe-Hin Tjio travelled from Spain to Sweden to work with Albert Levan, that the truth dawned. Tjio and Levan, using better techniques, plainly saw twenty-three pairs. They even went back and counted twenty-three pairs in photographs in books where the caption stated that there were twenty-four pairs. There are none so blind as do not wish to see." (Matt Ridley, Genome: The Autobiography of a Species in 23 Chapters, p 23-24)
Good, someone else not watching the Superbowl. Interesting article.
No reception.
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[singing] new math! new-hu-hu math! It won't do you a bit of good to review math... |
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Erectus Ahoy (Stone Age Voyages)
Science News | 10-22-2003 | Bruce Bower
Posted on 10/22/2003 12:28:49 PM PDT by blam
http://www.freerepublic.com/focus/news/1006058/posts
Hobbit remains found in Australia
Reuters | Wed, Oct 27, 2004 | Patricia Reaney
Posted on 10/27/2004 10:51:55 AM PDT by presidio9
http://www.freerepublic.com/focus/news/1258944/posts
More bones of hobbit-sized humans discovered
Reuters | October 11, 2005 | By Patricia Reaney
Posted on 10/11/2005 8:34:12 AM PDT by aculeus
http://www.freerepublic.com/focus/chat/1500507/posts
Hobbits May Be Earliest Australians
The Australian | 12-8-2005 | Carmelo Amalfi/Leigh Dayton
Posted on 12/07/2005 3:01:40 PM PST by blam
http://www.freerepublic.com/focus/news/1535978/posts
Did The Flores Hobbit Have A Root Canal?
Scientific American | 4-18-2008 | Kate Wong
Posted on 04/20/2008 7:35:51 PM PDT by blam
http://www.freerepublic.com/focus/news/2004560/posts
Hobbit’s relatives may have existed in northern Australia
Top News India | Tuesday, May 27th, 2008 | Sahil Nagpal
Posted on 05/28/2008 9:43:22 AM PDT by SunkenCiv
http://www.freerepublic.com/focus/chat/2022496/posts
First Australians did not boost fire activity
PhysOrg | Monday, December 6, 2010 | Bob Beale
Posted on 12/08/2010 7:23:50 AM PST by SunkenCiv
http://www.freerepublic.com/focus/chat/2639347/posts
First Mariners
Archaeology | Volume 51 Number 3 May/June 1998 | Mark Rose
Posted on 09/25/2004 12:44:19 AM PDT by SunkenCiv
http://www.freerepublic.com/focus/chat/1226673/posts
Even today, there are reports of "hairy wild men" being seen in Australia. So maybe they are still there.
All I know is I am glad some of my ancestors survived long enough to mutate.
“Charlie don’t surf!”
Crikey.
“Did Early Humans Ride the Waves to Australia?”
no, they walked...
http://www.youtube.com/watch?v=SwDm6oxJVSg
Bushmen from the Khomani San community strike poses in the Southern Kalahari desert, South Africa Photo: GETTY
blam, anything on the Bushmen (San people) DNA?
Why not? There was that Norweign guy who sailed around the Pacific on a raft named the Kon-Tiki.
The Kon-Tiki left Callao, Peru, on the afternoon of April 28, 1947. It was initially towed 50 miles out to open water by the Fleet Tug Guardian Rios of the Peruvian Navy. The ship then sailed roughly west carried along on the Humboldt Current.
Couldn’t have; there weren’t any Waves for sailors to ride before WWII.
Other than that minor detail, interesting article.
"For a long time, scientists had assumed…"Isn't this how all scientifik articles begin?
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