Why Europeans have a white skin?

Why Europeans white skin? Most of us believe that Europe is the ancestral home of the white skin. But a new study shows that light skin, as well as other characteristics such as height and the ability to digest milk for adults, and reached most parts of the continent are relatively recent. It is the matter, presented at the 84th Annual Meeting of the American Association of Physical Anthropology and scientists who displays tremendous evidence of the recent development in Europe and shows that most Europeans do not contemporaries are like their ancestors 8,000 years ago.

The origin of Europeans have focused in the last year when the researchers completion of the genome sequence of the ancient inhabitants [the genome is a map of the genes can be accomplished from any living organism anytime for his qualities], and a large number of European residents old and not a few individuals. Comparing the key parts of DNA (DNA) across the genome for 83 individual Old from archaeological sites in Europe, the international team of researchers at the beginning of this year, said that Europeans today are a combination of mixing at least three ancient groups dependent on fishing and the combination and peasants who They moved to Europe in sporadic migrations over the past 8,000 years.

The study showed that the massive migration of patrons Alimnaya (Yamnaya [came from the current Russia) from the steppes north of the Black Sea might have brought Hindourbih languages ​​(Indo- European) to Europe by almost 4,500 years.

Now, a new study from the same team delves more of these massive amounts of information to search for genes that have undergone selection strong natural appeared [natural selection is the emergence of certain qualities in generations particular sex as a result of their own pace with the circumstance naturally compelling or assistant in reproduction where help these qualities to survive and reproduce ] - including desirable qualities to the point where it spread rapidly across Europe in the past 8,000 years. By comparing the genome of Europeans veterans with modern ones of the 1000 Genome Project, he found a world population genetics (Iain Mathieson), student post-doctoral stage in the laboratory of the world population genetics (David Reich) at Harvard University, found five genes associated with changes in nutrition and skin pigment has come under strong natural selection.

Scientists confirmed an earlier report that the accredited living on fishing and combined in Europe were not able to digest the sugar in milk before the year 8000. Also noticed an interesting development: the first farmers were not able to digest milk. The peasants who came from the Near East (Near East) before almost 7,000 years and the shepherds who came from Germany steppe before almost 4,800 years old lack the gene copy (LCT), which allows for adults to digest the sugar in milk. It was not until almost a year before 4300 that began the ability to digest lactose (lactose tolerance) invade Europe.