The shape and size of the nose have evolved to adapt to different types of climate on Earth, according to a study published Thursday in the American scientific journal PLOS Genetics.
These findings confirm the authors of these studies, confirming previous studies that people whose ancestors lived in a hot and humid climate tended to have nostrils wider than the descendants of populations of cold and dry regions.
According to them, narrower nostrils allow to increase the humidity of the air by heating it, which is appreciable in colder and dry regions.
Cold, dry air is not good for the airways, said Arslan Zaidi of the Department of Anthropology at Pennsylvania State University. “There is no universally better nose shape, the reality is that our ancestors were adapted to their environment.”
The international scientific team used 3D images to measure the shape of the nose of 476 volunteers whose ancestors lived in South and East Asia, West Africa and Northern Europe.
They recognized that the history of nose evolution was complex and advanced that other factors, including cultural preferences in the choice of sexual partner, might also have played a role.
Examining this evolution and nasal adaptation to climate could have medical and anthropological fallout.
“Sudies on human adaptation to the environment are essential to our understanding of diseases and could provide insights into the origins of certain pathologies, such as sickle cell anemia, lactose allergy or cancer Of the skin that are more common in some populations, “scientists said.
It may be appropriate for them to investigate further whether the shape of the nose and the size of the nasal cavity are related to the risk of contracting a respiratory illness when a person lives in a different climate from that in which his ancestors lived .