Tuesday, December 10, 2013

The Origin and Dispersal of Modern Humans - Chapter 12




Current data suggest that modern humans evolved from archaic humans primarily in East Africa.  About  195,000 ya according to fossil found in Ethiopia that shows early changes in the human skull,  changes that we associate with modern people.  More advanced transitional forms have been found at Laetoli in Tanzania dating to about 120,000 years ago.  By 115,000 years ago, early modern humans had expanded their range to South Africa and into Southwest Asia (Israel) shortly after 100,000 years ago.  There is no reliable evidence of modern humans elsewhere in the Old World until 60,000-40,000 years ago, during a short temperate period in the midst of the last ice age.
The archeological evidence that we have today leads to believe that Homo sapiens began migrating to Asia by at least 70,000 years ago.  Homo sapiens who had once reached Asia, decide to travel to Australia about 46,000 ya.  Because Australia was not connected to Southeast Asia by land, it is probable that these first Australian Aborigines arrived by simple boats or rafts.  Modern humans reached the Japanese Islands more or less around 30,000 ya. It’s believed that around 35,000 to 30,000 ya, moved to Siberia and then from there around 20,000 – 15,000 ya they decided to come to America through via Beringia. The Beringia would be an intercontinental land connection between Siberia and Alaska during the ice, so the area was covered in ice, allowing for crossing. That was the first time modern humans had contact with the new world (there are some controversies on that but the Beringia hypothesis is the most accepted). By 11,000 ya, several species of animals in the new world were exterminated, which might have been a combination of the cold temperatures of the ice age, along with the result of human hunts with use of tools.
As we all know the Upper Paleolithic was a period of incredible diversity and technological innovation. During this period, the trends were leading towards creation of very efficient stone tools, including the development of blades. These two blades were from this period of time: 













Along with these technological advances, came great innovations in artistic expression.  The Upper Paleolithic transition brings the first great works of art to the world, including the remarkable cave paintings in Southwest Europe and the small “Venus figurines”. The “Venus figures” is a term used to combine into the same group, prehistorical little sculptures representing. Mostly found in Europe dating the Upper Paleolithic period, these statuettes had features representing a woman’s body with some anatomic exaggerations.
During the Upper Paleolithic, we can also find evidences that people decorated their bodies. Some of elements would be necklaces and what appear to be tattoo kits, to mark their skin.  In the Upper Paleolithic the kind of cultural variation that we see today started. The ability to use highly complex language from this time is indisputable, but it is known that they used some sort of symbolic method of communication.
Now, let’s take a look at the places where these early modern humans were found, going back in time about 100,000 ya, to understand the earliest modern human found and where things took place. Dating the period of time, the specimens come from Africa, more specifically Ethiopia. Using advanced technology, they were able to identify that the skull found at that location dated about 195,000 ya, which would be the earliest modern human ever found.
In Israel, at Mt. Carmel the fossils found date 130,000 to 100,000 ya while the Qafzeh has been dated around 120,000 and 92,000 ya. In China, there are seven early anatomically modern human localities found, with the earliest one dating 200,000 ya.
In Central Europe there is evidence of the earliest anatomically modern human found in Europe dating 35,000 ya. 



Personal Input

Taking a look at the Upper Paleolithic feels like looking to ourselves nowadays. Although this time period happened thousands of years ago, it is so evident that they began a cultural tradition that has carried on until today. As we mentioned in class, they probably had a plan when started to disperse, because they were looking for something new that could also be dangerous and put them in risk. Have survived to the modern human expansion, is a clear result of a plan that worked.
I found it particularly interesting the art present at this period of time. Although not proven that the ability to develop a culture, create art and communicate is not 100% proven to be related to the bigger size of the brain in modern humans, I do believe something led them to start thinking about life as an interesting experience rather than just being. 



Additional Information

This first article I found right after we watched the movie in class related to the modern humans having a certain amount of Neanderthal DNA, but I thought I should hold on to this article and share it on this blog post. This article will talk about a research from scientists from University of Cambridge who believe our “Neanderthal” part of DNA did not come from the result of an interbreeding between both species, but actually from a possible common ancestor we shared.  


This is a very interesting interactive timeline from the Smithsonian National Museum of Natural History’s website. This timeline allows you to click on each species and it will show you an explanation about the species with images.


This is another interactive link to PBS.org. It is a toolbox from the Upper Paleolithic and as you click on each tool, a multiple choice question will come up for you to identify the tool and its use.


My last link I will share with you for this blog post is about a very beautiful statuette part of the “Venus Figurines” and I really loved this one so I decided to research a bit more on  it and share with you here.







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