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 61 
 on: July 19, 2009, 09:15:45 PM 
Started by Robert Henvell - Last post by Robert Henvell
In the 10 July 2009,Vol 325,Science,page 148-c,Paul Goldberg et al contend that the micromorphological and FTIR results are not compatible with the coprolite specimen 1374-5/5D-31-2 being that of a human being.

 62 
 on: July 17, 2009, 03:27:23 AM 
Started by trehinp - Last post by trehinp
Received today in my "Science" alert news:

Quote
Sequencing Neandertal Mitochondrial Genomes by the Half-Dozen
Elizabeth Pennisi
Fourteen years ago, sequencing just a few hundred bases of mitochondrial DNA from a Neandertal drew applause worldwide. Ancient DNA studies have come a long way since then. On page 318 of this week's issue of Science, researchers describe using a new technique to decipher the entire mitochondrial genomes from five of these extinct humans. These genomes show relatively little genetic diversity among Neandertals scattered across Europe and Russia. By the group's calculations, this diversity translates into the equivalent of at most 3500 breeding Neandertal females, or up to 7000 including males, lower than previous rough estimates of about 10,000. With relatively few individuals, the species may have been more vulnerable to extinction from climate change or competition from our ancestors, the researchers say.


If confirmed by other teams, this could lead to some interesting discussions...

Paul

 63 
 on: July 15, 2009, 09:43:02 PM 
Started by Jacques Cinq-Mars - Last post by Jacques Cinq-Mars
All:
Here is the sad story of a poor fellow who not only died at a young age but also died late.

You cou can read the press story here:  <http://planetearth.nerc.ac.uk/news/story.aspx?id=478 >, and here are the journal's title and abstract:

Angela L. Lamb, Silvia Gonzalez, David Huddart, Sarah E. Metcalfe, Christopher H. Vane, Alistair W.G. Pike. Tepexpan Palaeoindian site, Basin of Mexico: multi-proxy evidence for environmental change during the late Pleistocene–late Holocene. Quaternary Science Reviews xxx (2009) 1-17.

" The Tepexpan Palaeoindian skeleton was discovered in 1947 close to the former Lake Texcoco margin, in
the Basin of Mexico. The find has been the object of considerable interest and discussion over the last
60 years regarding its real age and archaeological interpretation. Here we report new AMS radiocarbon
dates associated with the sedimentary succession at Tepexpan with ages between 19,110   90 and
612   22 14C years BP and a new uranium-series date for the skeleton with an age of 4700   200 years BP
that indicates a mid Holocene age. The sedimentary succession was studied in detail using: stable
isotopes, diatoms, organic geochemistry and tephrochronology. The multi-proxy evidence suggests large
changes around the margins of Lake Texcoco in terms of the balance between aquatic and terrestrial
plants, C3 and C4 plants, saline, alkaline and freshwater conditions, volcanic activity, marginal reworking
of lake sediments and input from the drainage basin through the late Pleistocene–late Holocene. These
changes had large impacts on the prehistoric human populations living by the lake shores since the late
Pleistocene in the Basin of Mexico."

Not much to say about this except that the news must have been a very pleasant one to the north of the Mexican border Clovis First hardliners. But wait for the next story ...

Jacques

 64 
 on: July 13, 2009, 09:21:33 PM 
Started by Jacques Cinq-Mars - Last post by Charlie Hatchett
Wow!

Very nice.

Thanks for the heads up, Jacques.

 65 
 on: July 12, 2009, 05:09:23 PM 
Started by trehinp - Last post by trehinp
Saturday's French paper "Le Monde", 11 july 2009, reported a new discovery in a Birman forest which may restart the debate on African vs Other continents Human origin.

Actually the paper mentions extremely early primates precusors which may have preceded future evolution of all other primates. A 37 million years old tooth indicates that such anthropoids precursors started in Asia.

The English paper was published in the world famous "Proceedings of the Royal academy" July 1, 2009.

More information in English available Click here for more

The other French journal "Le Figaro" reported the same finding; more info in French available Click here for more

Paul

 66 
 on: July 12, 2009, 04:36:08 PM 
Started by Jacques Cinq-Mars - Last post by trehinp
Thanks a lot Jacques,

This is a fabulous documentary on Lascaux.

Paul

 67 
 on: July 10, 2009, 04:46:27 PM 
Started by Jacques Cinq-Mars - Last post by Jacques Cinq-Mars
All,

While he actual cave may remain closed, one can at least visit and enjoy the following new, and very elegantly and didactically done virtual presentation: < http://www.lascaux.culture.fr/#/fr/00.xml >.

Jacques


 68 
 on: July 02, 2009, 07:14:56 PM 
Started by Robert Henvell - Last post by Robert Henvell
If one goggles British Academy Volume 144;The Mesolithic Neolithic Transition in North West Europe,2007,their is a link titled content,which allows one to download as many chapters as required at no cost!
Enjoy.

 69 
 on: June 26, 2009, 02:59:05 AM 
Started by trehinp - Last post by trehinp
Subscribing to Scientific American on line, I received today this interesting paper:


Quote
Evolutionary Origins of Your Right and Left Brain
The division of labor by the two cerebral hemispheres—once thought to be uniquely human—predates us by half a billion years. Speech, right-handedness, facial recognition and the processing of spatial relations can be traced to brain asymmetries in early vertebrates
By Peter F. MacNeilage, Lesley J. Rogers and Giorgio Vallortigara   
From the July 2009 Scientific American Magazine

Click here for more

The paper is accessible, as most of the times Scientific American papers. It provides a summary view of the subject matter. Not for specialists of course, but could be useful as general background "scientific varnish"...

Yours

Paul

 70 
 on: June 23, 2009, 03:52:29 PM 
Started by Charlie Hatchett - Last post by Robert Henvell
Jacques,
Did your field trip last summer reveal any new data?
Bob

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