The study revealed a new cause of evolutionary change of the human face
Faces of ancient people and modern man are very different - scientists believe that these changes took place over four million years, as a response to climate change, a way of eating and breathing physiology. However, researchers often overlook another reason why the rough face of the ancient people could be like now - a social necessity. For a better understanding of each other, the people needed to make active use of facial expressions, so that evolution had much to soften the "hard mask" of our ancestors.
According to the professor of anatomy at York University Paul O'Higgins, in a number of factors in the formation of the modern person is worth mentioning not only diet, physiology of breathing and climate, but also the need for people to express their emotions using facial expressions. Using the skin, bones and muscles, modern people can express 20 different categories of emotion, but the ancient people, this opportunity was not available.
To express feelings such as recognition and sympathy, human eyebrows were lowered down to the forehead left more space for their movements. At the same time the person became smaller and slimmer - all this can be seen in the fascinating video below.
We believe that the need for enhanced communication was probable cause that the person's face has become less and less pronounced eyebrows. It is possible to use a thinner facial expression and, consequently, to improve nonverbal communication. Rodrigo Lakruz, a biologist at New York University
, of course, a new factor to influence the shape of the human face does not negate the other reasons for the changes. For example, a decrease in the jaw of people contributed to the rejection of a tough plant foods - ancestors ceased to break her teeth and began to prepare, process, and cutting means at hand.
A soft diet reduced the human face. However, there are limits to how much it can change - for example, breathing requires a fairly large nasal cavity.
Paul O'Higgins, professor of anatomy
Scientists believe that over time the human face will continue to change. In particular, the planet's temperature increase probably will change the shape of the nose, the air can be cooled before it enters the lungs.
What do you think, what other changes tolerate our faces in the course of evolution? His assumptions share in the comments or in our Telegram-chat.