This sounds incredible. After all, many animals in the world also have eyebrows, which are the first line of defense to prevent dust and other objects from entering the eyes. However, for humans, eyebrows have a more important role than defending against dust.
Scientists have come to this conclusion largely because they have made a comparative study of a male Homo sapiens skull fossil and modern human skulls. The skull of this male Homo sapiens has a huge brow ridge, which can be inferred that his eyebrows are very thick, which was also a symbol of power and status hundreds of thousands of years ago.
However, in the eyes of scientists, the prominent eyebrow bone is a sign of enhancing expressiveness, which can show its position in group life, and when facing other animals, rich facial expressions can also have a deterrent effect on them.
The researchers also found that early Homo sapiens had learned to use the muscles near the brow bone flexibly. They can not only express their emotions more flexibly, but also judge the current situation through the expressions of others. In this way, Homo sapiens can communicate with expressions, increase mutual trust and make new friends.
This may not be worth mentioning to modern people, but it is a great progress for early homo sapiens, because they need to make more efforts to develop their brains without enough language foundation, and facial expressions are a new direction.
Although the brow bone of human beings is not as prominent as that of Homo sapiens at present, which is also the result of evolution, scientists believe that the eyebrow is probably the key to win the competition between Homo sapiens and Neanderthals, because it unites more groups and promotes the communication between different races, thus providing more support for the evolution of Homo sapiens.
To sum up, Homo sapiens still has many details worth exploring, and scientists are collecting more clues to restore a complete evolutionary path for people.