All people have this groove, although biologists cannot understand why it appeared there during our evolution.
This is actually the vertical groove between the base of the nose and the border of the upper lip. Professionally speaking, it is a philtrum. But what is it and why do we have it?
According to available data, the explanation is related to the way that the face is shaped during the development,-claims IFL Science.
Philtrum indicates the location where the different parts of the face merge into one.
“That place is the point where all face parts are connected” – explains Dr. Michel Mosley.
“The three main parts of the face are connected on the upper lip, forming this groove which is called philtrum.”
The development of a person’s face occurs between the second and third month of pregnancy, and if it is not formed at that time, due to genetic or other reasons, then it will never develop.