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why Asians have slanted eyes? Genes Asian

The correct word is Mongolian flange and it is a fold of skin that extends into the upper eyelid covering the retreat of the lacrimal caruncle and extending down to join the facial skin.

According to a theory of American anthropologists of the 50's, the origin of this skin formation could be due to an adaptive need during the first great glaciation to protect the eyes of extra UV radiation, the wind and low temperatures that devastated the steppes of Central Asia 18 million years ago. However, several Chinese scientists argue that skin formation is a consequence that a large number of Asians from a branch of hominid different from ours. This theory is based on the discovery in 1921 of Homo erectus pekinensis , remains to consider confirm that when Homo erectus migrated from Africa to Asia, it survived and gave rise to the Mongoloid race. The vast majority of international anthropologists reject this idea and believe that when Homo erectus migrated from Africa to Asia, this was extinguished and only African Homo erectus survived and evolved into what today we all are and we know as Homo Sapiens.

certainly a special time and had to be curious when the first European came face to face with a person with Mongolian flange. There is a very rigorous data but we think that probably occurred around 220 BC C. This theory is based on a passage from the Greco-Bactrian kingdom which refer to their empire extended to the country of the Seres, a place that researchers placed to the northwest of modern China.

We must go back to the sixteenth century to find the first extensive and detailed description of the physiognomy of the eastern population. It would be the friar and mathematician cosmographer Martin de Rada, who during an expedition English who first entered the Chinese territory on behalf of the English monarchy, he would write several relationships that would be of great importance to know and disseminate Chinese culture as no European had ever done before, even allowing certify that the Cathay of Marco Polo and China were the same country.

Sources: Wikipedia.

Like Herpes In My Sinus

of East European Imports

is claimed that 80,000 years ago initiated a human population migrated from eastern Africa to the African continent and then eventually out of Africa, creating different branches or haplogroups.

In human genetics, the haplogroups most commonly studied are Y-chromosome haplogroups (Y-DNA) haplogroups and mitochondrial DNA (mtDNA), which can be used to define genetic populations.

studying the genetic markers present in each population group can be made, some descendants of others, and finally to find the ancestors that gave rise to the human population in the case of mtDNA analysis reaches the so-called Mitochondrial Eve "and in the case of the Y chromosome analysis, the"-Y chromosome Adam. "

is interesting to observe some theories that determine the Asian origins of the two most common haplogroups in Europe, the group R1a and R1b, R1a

is a Y-chromosome haplogroup, subclade of haplogroup R, which is located in a region from Eastern Europe to India, presenting two peaks in each of the extremes in this area: one in Eastern Europe, where densities are more than 50% among the Sorbs, Poles and Ukrainians, and another peak in the Pamir region, which lies between the boundaries of Central Asia with South Asia populations such as Kashmiri Pandits (72%) and Tajikistan ishkashimis (68%). Frequencies are also significant in other areas of Central Asia, reaching Siberia and in Scandinavia, where some carriers, possibly Vikings, spread to Britain. It is believed that the dispersal of this haplogroup is associated with the expansion of Indo-European languages \u200b\u200b(which are spoken by almost half the world population), in particular the expansion of Slavic and Indo-Iranian languages.


The exact point of origin of R1a pattern today is still under debate, but according to the theory of geneticist Stephen Oppenheimer of Oxford University, sets the origin of this haplogroup in southern Asia about 36,000 years , where then would have spread. It is based on the diversity of R1a in Pakistan, northern India and eastern Iran.

Haplogroup R1b is most common among people in Western Europe, especially in the areas closer to the Atlantic Ocean, mainly in Welsh and Basque 89% 88%. Then in the Irish 81%, Northern Portuguese 81%, Catalan 79%, Scottish 77% English 75% Dutch 70%, other 70% English, Belgian, Portuguese 63.0% and 60% south. Found less frequently in Italy (mainland Italy): 40%, 39% Germans, Czechs 35.6%, Sicilians: 24.5%, 25.9% Norwegian, Swedish 20%., Sardinian and Croats 19%: 15.7%. It is also common among people in America due to expansions Europe from the fifteenth century.


At first it was thought that R1b originated in Western Europe where we find the highest frequencies, but now some variants of R1b in the east, makes some geneticists postulate an origin in Central Asia or the Middle East and gives an age of 18500 years.

Sources: Wikipedia, genographic.nationalgeographic.com


Links:

Genographic: Genographic Project is seeking to register a new knowledge about the migratory history of the human species using an advanced analysis computer laboratory and DNA which contribute hundreds of thousands of people around the world.

Kit: Kit Genographic Project Public Participation.

Stephenoppenheimer: Interactive Map theories geneticist Stephen Oppenheimer

Swollen Toe Out Of Nowhere

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The origin of the rugs is uncertain but some historians suggest that the Turkestan in Central Asia was the cradle of this tissue between the IV and II a. C. Later people who emigrate from this territory would extend this type of textiles to the West, to Persia, the Causasus and Anatolia, the East: China and later the South: to India.

After the period of domination by the Arab Caliphate, a Turkish tribe, the Seljuks, conquered Persia. Your domain (1038 - 1194) was of great importance in the history of Persian carpets with the introduction of Turkish knot. Another significant moment came with the Safavid dynasty. Shah Abbas I the Great, send building workshops for the Persian territory where skilled designers and craftsmen set to work to create splendid specimens.

In Spain, the carpets are made by the Arabs in the tenth century The Crusades made Turkish carpets in Europe where they were primarily hung on walls as tapestries or used on tables. Only after the opening of trade routes in the seventeenth century came the Persian carpets. Its use in Western households as a cover to soil did not become popular until the eighteenth century.

Sources: Wikipedia,


Links: Youtube

: Have you ever wondered how to do a carpet?