# Like two drops of water. Scientists have calculated the probability of double

Like two drops of water. Scientists have calculated the probability of double

MOSCOW, 15 Feb — RIA Novosti, Alfia Enikeeva. In 2017, the American Josiah Martin became famous with the incredible resemblance with the main character of the series “Game of thrones” Jon snow. After a year in one of the Russian Instagram accounts showed an exact copy of the wife of the English Prince Harry’s Meghan Markle. In such matches there is no mystery, say scientists. Doubles is a completely rational explanation.

One in a trillion

In 2016 Irish student Niamh Gini has launched a social media campaign to search for his DoppelgangeR. After a couple of months, she met with American Irene Adams, like her as two drops of water. A DNA test showed that girls, despite the striking resemblance, not relative. Their common ancestor lived no later than 20 thousand years ago.

Scientists from the University of Adelaide (Australia) analyzed data from the measurements of about four thousand individuals and identified eight key parameters which can determine the degree of similarity of different people. First and foremost is the distance between the eyes, the ears and eyebrows, nose length and mouth width.

The results of the calculations showed that the probability that somewhere on the Earth lives at least one pair of people who match all eight parameters — 1:135. However, their chance to meet is one in a trillion.Vague resemblance

Australian scientists rather harshly come to the definition of twins. If the distance between the ears differed by only one centimeter, people not considered similar to each other. But the human brain treats faces differently.

According to a study by American neuroscientists, a number of zones of our brain responsible for the perception and face recognition are activated only if the image of the face occurring together with body image. According to scientists, it allows to correctly interpret facial expressions, eye expression and emotional state.

Unlike artificial face recognition system, we are able to identify acquaintances of even highly distorted images. In the experiment, American researchers and the volunteers knew the celebrities, despite the fact that they were stretched out, their width was only a quarter of the original. In other words, the brain perceives the image as a whole. Therefore, a slight difference in the ratio of common features will have no effect on the result is to count people like or not.