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Sunday, June 25, 2017

The climate in unexpected ways to affect the shape of the nose


For a long time it was believed that the shape of the nose of the various Nations were formed, primarily under the influence of cultural features that influence the aesthetic preferences of people. But a new study conducted by researchers from the University of Pennsylvania, suggests that the role of climate in this issue is still underestimated.


photo: pixabay.com

Using 3D technology, experts have studied and compared the noses 476 volunteers of Asian, African and European descent. As it turned out, people whose ancestors lived in more hot and humid climate, often had wide nostrils, while the climate of the Nordic countries, by contrast, contributed to the formation of more narrow nostrils. In General, however, of the seven scientists selected characteristics of the shape of the nose, only two could vary considerably within the group of people with similar origin, the rest were the same, and researchers are inclined to see in this the influence of natural selection.

The researchers note that more “good” or “good” shape of the nose does not exist, and each of the most common variations were formed under the influence of certain climatic conditions and is most suitable it for them.

The specialists managed to detect that the overall shape of the nose at different people, even far from each other in origin, differed not so much, as is sometimes assumed.

In the future, the researchers plan to conduct further studies to confirm their findings and find out, which genes might be attributable to the observed differences. Also experts expect to clarify whether the shape of the nose from any other factors – such as respiratory diseases common to not this or that territory.

The results scientists reported in the pages of scientific publications PLOS Genetics.

source

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