What is the secret?
Ever wondered why black is such a skin? Looks not very logical for such a complex and “tricky” process, as evolution, to give people the skin color which is the hottest regions will contribute to further heating of the body. So simple?
Indigenous people and immigrants from Africa have dark skin. Such people belong to the Negroid race, one of the three great races of mankind. Even children know that the skin color of the races is associated with climatic features of the region, where their representatives (or their ancestors). Interestingly, the closer to the equator, the darker skin in humans. However, why evolution is a process whose purpose is the preservation of useful characteristics and sort out the traits of an organism, ordered this way? Everyone knows that all black is strongly heated in the sun? It is obvious that more heat in the heat – not the best quality, informs Rus.Media.
To assess the quality of the color black can every enthusiast in the summer. Just put a black t-shirt and go out in the sun. Will soon have to feel the sun’s rays to bake more than usual. In fact, the nature knows this and actively using features of black color. For example, polar bears with white fur hides of black leather, which contributes to the accumulation of heat from sunlight. However, blacks differently distributed adipose tissue.
So what about the blacks? Actually, it’s not that easy and all goes beyond the color of their skin. To start with the fact that the representatives of the Caucasoid race and Negroid races differ from each other in the distribution of fat tissue. Through the cold climate of the European race fat distributed throughout the body, at that time, as have blacks it accumulates in certain places, leaving the body more “free” places for effective sweat and heat transfer.
That allows black it is better to cool Dark skin in this case was given to the evolution of the people not through the need to accumulate heat and, if necessary, to effectively counter the increased amount of ultraviolet rays that fall on the skin. To say “thank you” should be the pigment of melamine, which makes the skin dark. If blacks nature formed a dark skin, the people at the equator are more likely to have developed cancer. As you know, ultraviolet light can damage the DNA structure. While dark skin helps to cope with ultraviolet light.
An interesting fact should be added that recent genetic studies of the distant ancestors of the European race suggests that our ancestors also had dark skin when they migrated from Africa to Eurasia. Here, however, they began to mix with the white-skinned Neanderthals, and the evolution began to adapt humans to new environments.
Thus, dark skin is strongly heated, however, this “disadvantage” kompensiruet other characteristics of the organism. She’s a very important protective function for residents of the equator.