Why do people have chins? A new study reveals information on the matter, and suggests that humans developed chins by improving social skills.
What is the purpose of chins? Do they fill any role or are they simply an aesthetic part of our face and have no other purpose? A new research has tried to find and answers to these questions which and the results are quite interesting.
In a study published in the Journal of Anatomy, researchers believe that humans have developed chins because we have improved our social skills and it has nothing to do with the type of foods we eat whether if they are soft or hard.
An expert from the University of Iowa, Nathan Holton, along with his team, analysed x-ray pictures taken from the Iowa Facial Growth Study. This images portrayed the evolution of the skulls of children starting from the age of three years old to the adult stage.
Researchers have studied the jaw evolution with the help of 292 measurements taken form 19 men and 18 women. The results showed that the chin starts to become obvious as years go by, but researchers didn’t find a link between how prominent the chin is and resistance.
What was interesting was the fact that jaws appeared to be more resistant at younger ages, when the chin was not fully developed which lead researchers to ask themselves what is then the role of chins, if they don’t protect the jaw?
Scientists assumed that in fact we didn’t grow chins, and have reasons to believe that our faces became smaller in the chin area, during the period our primitive human ancestors started to transform into modern humans. This is strongly connected with control and male behaviour.
If we compare the chins of Homo Sapiens to the one of Neanderthals it is obvious that the modern humans have more prominent chins and our face shrunk with up to 15% compared to the Neanderthals.
The explanations for that might have to do with the time when our ancestors traveled from Africa and formed societies, human males were obliged to develop a more social behaviour rather than competitive,meaning that their testosterone levels had diminished.
Science has shown that reduced levels of testosterone are softening and diminishing the bone structure of the face, meaning that the hormonal chances that occurred when we became social beings have also transformed our features.
The reason why we have chins is still kind of a mystery but interesting at the same time, mostly because we are the only beings on Earth having them. People have started analysing chins only after we have started to have them and different shapes and structures have been assigning names like, round chins, strong chins, dimpled chins, weak chins and so on.
The chin is something that represents the human face, even if it has no practically use. Just try to imagine how ridiculous we would look without them.
For example there are people who have a dimple or a crease on their chin, which has received the name of cleft chin. It has been said that this type of chin, depends on a single gene with two variations, C being the main gene for cleft chin while S being the gene responsible for the smooth chin.
However, the lack of sufficient genetic information available so far proves that this theory is fake.Moreover, there are many other types of chins apart from clear and cleft chin.
For men, having a cleft chin is sign of masculinity while women with cleft chin are usually unhappy with the aspect of it and rely on plastic surgery to change it.