Image of reconstructed faces of three early humans in profile view.

The myriad of skin tones and eye colors that humans express around the world are interesting and wonderful in their variety. Research continues on how humans acquired the traits they now have and when, in order to complete the puzzle that is our ancient human history. Now, a recent analysis by anthropologists suggests that the light skin color and the tallness associated with European genetics are relatively recent traits to the continent.

An international team of researchers as headed by Harvard University’s Dr. Iain Mathieson put forth a study at the 84th annual meeting of the American Association of Physical Anthropologists recently.

Based on 83 human samples from Holocene Europe as analyzed under the 1000 Genomes Project, it is now found that for the majority of the time that humans have lived in Europe, the people had dark skin, and the genes signifying light skin only appear within the past 8,000 years. This recent and relatively quick process of natural selection suggests to researchers that the traits which spread rapidly were advantageous within that environment, according to the American Association for the Advancement of Science (AAAS).

This dramatic evidence suggests modern Europeans do not appear as their long ancient ancestors did.

Spreading Genetics

The samples are derived from a wide range of ancient populations, rather than a few individuals, and they supplied researchers with five specific genes associated with skin color and diet.

AAAS reports that the “modern humans who came out of Africa to originally settle Europe about 40,000 years are presumed to have had dark skin, which is advantageous in sunny latitudes. And the new data confirm that about 8500 years ago, early hunter-gatherers in Spain, Luxembourg, and Hungary also had darker skin: They lacked versions of two genes—SLC24A5 and SLC45A2—that lead to depigmentation and, therefore, pale skin in Europeans today. […]

Then, the first farmers from the Near East arrived in Europe; they carried both genes for light skin. As they interbred with the indigenous hunter-gatherers, one of their light-skin genes swept through Europe, so that central and southern Europeans also began to have lighter skin. The other gene variant, SLC45A2, was at low levels until about 5800 years ago when it swept up to high frequency.”

This differed from the situation farther north. Ancient remains from southern Sweden 7,700 years ago were found to have the gene variants indicating light skin and blonde hair, and another gene, HERC2/OCA2, which causes blue eyes. This indicated to researchers that ancient hunter-gatherers of northern Europe were already pale and blue-eyed. This light skin trait would have been advantageous in the regions of less sunlight.

Natural Selection

Mathieson and colleagues do not specify in the study why the genes were favored and spread as quickly as they did, but it is suggested that Vitamin D absorption likely played a role. Ancient hunter-gatherers in Europe also could not digest milk 8,000 years ago. The ability to do so only came about 4,300 years ago.

Paleoanthropologist Nina Jablonski of Pennsylvania State University notes that people in less sunny climates required different skin pigmentations in order to absorb and synthesize Vitamin D. The pale skin was advantageous in the region, as well was the ability to digest milk.

“Natural selection has favored two genetic solutions to that problem—evolving pale skin that absorbs UV more efficiently or favoring lactose tolerance to be able to digest the sugars and vitamin D naturally found in milk,” writes AAAS.

This new research follows related studies on pre-agricultural European genomes and modern humans in Europe before the rise of farming.

Artist’s depiction of Stone Age peoples

DNA taken from the wisdom tooth of a 7,000-year-old human found in Spain in 2006 overturned the popular image of light-skinned European hunter-gatherers. The study revealed that the individual had dark hair and the dark-skinned genes of an African. However, the man had blue eyes, an unexpected find by researchers. The hunter-gatherer is the oldest known individual in Europe found to have blue eyes.

Artist’s impression of a blue-eyed hunter gatherer

I’ve always found eye and hair colour fascinating, my Father was one of eight children, his seven siblings were all fairer skinned and had blue eyes, except my Father who had brown eyes and brown hair.
I am one of five boys, we are all brown eyed and brown haired, except for one, who is fair skinned and blue eyed. funny old thing genes huh? I certainly find this article interesting in its implications. However, I can’t help but wonder about older suspected fair skinned peoples found around the world. In particular, the Solutrean peoples from western Europe around 20-15 thousand years ago are believed to have been fair skinned and archaeologists are just now beginning to find evidence of their travel to the Americas between 17-13 thousand years ago.

It is believed that the evidence found from these peoples show that they were fair skinned. There are other examples around the world as well. I just find it hard to believe that such a dominate trait in the world today could be so recent. In addition, how did these people cope with the radically reduced amount of sunlight and thus vitamin D which was an ever present problem in the northern climes. Were these people able to cope perfectly fine for 30 thousand years in Europe and then suddenly needed more vitamin D so adapted to paler skin only 8 thousand years ago? Why? This does not make sense to me.

In order for this trait to be useful it must have been developed earlier than 8 thousand years ago. Pale skin is not a dominant trait, as witnessed by the majority of the earths population having dark, tan and colored skin. That is the history the west has perpetuated on the world so that western europe cold hold its power in the world. More “Historical Revisionism” or real science? Hard to say, but why would the people “suddenly” develop white skin after tens of thousands of years and not before?

I still “want to believe” that Whites came from the “gods” who “down from heaven to Earth came” as Zacharia Stichin said and what many many cultures around the world believe too. White is simply the result of genetic engineering and mixing of native and extraterrestrial DNA but that`s hard to prove especially that nobody (in the scientific community) would ever seriously consider this possibility Asians, particularly northern Asians such as Koreans, Japanese and Chinese have skin the same shade of white as most Europeans. The idea of “white” being only 8 thousand yeas old is rubbish. Is this study the result of some government grant? I want my money back if it is.

Originally posted: http://www.ancient-origins.net/news-evolution-human-origins/white-skin-developed-europe-only-recently-8000-years-020287

Comments

comments