Faces like twins, even though they are not brothers. why can, huh? & bull; hello healthy

Have you ever heard comments from people around you, such as, "I think I saw you at the supermarket?" or, “I just got exposed to someone who looks really like you!”? In fact, you have never visited the supermarket at all, or even you don't actually have a biological twin. Well, you know?

Is it possible for identical twins father-mother?

In theory, each human being has at least seven twins who live in different parts of the world without our knowing it, and perhaps, most of us will never meet our "duplicates".

According to Daniele Podini, a forensic scientist and facial recognition expert at George Washington University, although the phenomenon of doppelganger, aka "twin" faces without blood relations has not been proven by science, he admits that statistically, the possibility of this phenomenon cannot be denied. The reason is the total human population size and the fact that human genetics works randomly.

Although human features and characteristics vary from those of other animals, our genes do not. In fact, humans are not completely genetically diverse. So in the end, it is the numbers that make up the genes that dictate that certain features will represent you and will randomly combine.

But this doesn't mean they are really duplicates of you. There is a slight bias from this claim, because each person's perception is based on personal experience.

The work of the brain in building facial perceptions

Facial recognition plays a key role in human interaction. When trying to recognize someone, the brain will work like a scanner which scans the person's face and turns every aspect of the face into a code.

The brain's facial recognition system is an effective way for you to distinguish one face from another, with one exception. The way you recognize another person's face may begin in a certain order: eyes, mouth, nose. The size and placement of the person's eyes, for example, will determine how you see the rest of their face. Other people may interpret it in the opposite way, for example, recognizing the face starting from the nose, mouth, eyes. Both brains get the same signal, but the random placement of features makes the brain focus on one feature (the nose) rather than adjusting the perception of the rest of the face.

This shows that the perception of your face in one person's eyes is not necessarily the same as how other people perceive your face. So if someone thinks you have a face that is very similar to his workmate, not necessarily other people will think the same.

Genetics and environment influence the doppelganger?

“You may find someone living thousands of kilometers away who looks like you, but if you look further from the background of your ancestors, you will find that maybe you and your" twin "came from the same place. Not surprisingly, if you come from the same ancestral background you will probably find common characteristics - stature, eye color, even temperament, "said Richard E. Lutz MD, Associate Professor of Pediatrics and Clinical Geneticist Munroe-Meyer Institute at the University of Nebraska. Medical Center.

Likewise with the similarities in personality that a pair of doppelgängers might have. Lutz argues that, while the environment (such as different diets, different physical activities, sun exposure and regional temperature in both places are different) can make the personalities of the doppelgangers different from one another, but culture has a bigger share in this case.

However, he said, genetics would still outperform any difference made by the environment. Your genetics are the dominant factors affecting your appearance and personality, whereas your environment or culture will influence the rest.

It's possible that someone is out there who looks and acts like you - and that person may be closer to you, both from your location and ancestral background. But, to come back again, the facial recognition process, something that is very critical in life being able to distinguish between friend and foe, is something we think works very definitely. In fact, not so. Many other factors that can influence our "likeness" to one another are not taken into account by the brain when processing a person's facial features.

Facial recognition is a complex and interesting argument for why the existence of the doppelganger so far is still uncertain.