In close friends, the DNA structure is more similar than in unfamiliar or unfamiliar people. According to the degree of genetic similarity, friendship corresponds to a fourth cousin*.
One possible explanation is that the common features of the genetic code in men and women, bound by bonds of strong friendship, were necessary for evolution. To survive, our ancestors had to cooperate with similarly developed individuals. “Suppose some of them had developed the ability to see well in thick fog,” says Nicholas Christakis, a sociobiologist at Yale University (USA). “This ability could help you hunt better, but you can’t go hunting alone. We need a friend who will support, and he must have the same advantage. In other words, the development of the same abilities in different people gives impetus to the evolution (and survival) of the entire population. Perhaps our common passion for the “Game of Thrones” is also part of the higher plan of Nature?
* Proceedings of the National Academy of Sciences, 2014, vol. 111, № 34.