The teeth of ancient people will tell scientists whether there lived our ancestors in the caves

© Illustration RIA Novosti . Alina Polymineralic of vitamin D, reflected in the teeth, will help scientists to reveal the migration routes of the ancient peopleThe teeth of ancient people will tell scientists whether there lived our ancestors in the caves© Illustration RIA Novosti . Alina Polyanina

. Canadian anthropologists have uncovered an unusual relationship between teeth structure, vitamin D and the Sun, which allows you to accurately determine where lived the ancestors of the people and ancient people and where did they migrate, according to a paper published in the journal Current Anthropology.

«This is a delightful discovery, as we now have a reliable way to find answers to a number of fundamental issues relating to the early history of mankind and the conditions in which our ancestors lived. In addition, it stresses the important role that vitamin D plays in the life of modern people,» said Megan Brickle (Megan Brickley) from McMaster University in Hamilton (Karnada).

The representatives of our generation, until recently, lived exclusively in warm and Sunny Africa, and only recently, about 80-100 thousand years ago, began to colonize Europe, Asia and the New world. As shown by recent genetic studies, these migrations significantly changed the character of these people, forcing them to adapt to the lack of light, cold climate and other harsh climatic conditions of the North.

One of the most interesting questions concerning the adaptation of Homo sapiens to living outside Africa is how our ancestors adapted to live in conditions of chronic vitamin d deficiency.

Its molecules are produced by skin cells when it is lighting, sunlight and play an important role in bone growth. Scientists have long been interested in what problems could experience our dark-skinned ancestors first came to the «dark» North, and suffered against them in principle, given that they spent most of their time under the open sky.

To know this is rather difficult because of the small size of the bones and their deformation are not always unambiguous evidence that their owner was rachitism due to lack of vitamin D and not bad access to food or any genetic diseases. Moreover, many scientists believe that people suffering from a lack of vitamin D always, even before the Exodus from Africa, and only after the emergence of civilization, this problem was largely solved.

Brickle and her colleagues found an ingenious way to verify this by examining the structure of the teeth of people suffering from rickets. Scientists noticed that a lack of vitamin D affects not only bone growth but also on how quickly grow the layers of dentin inside the teeth of the person. The teeth of rachitic, as noted by anthropologists, contain numerous dark points associated with violations in the cycle of vitamin D in the body, and these defects can be easily traced, where lived the holder of the teeth and how he migrated as a child when his teeth grow.

Examining sections of the teeth of ancient people, who lived in Greece about five thousand years ago in the days of antiquity, as well as in Canada during the reign of England, the scientists compared the number of anomalies in their dentin, however, the extent was deformed their bones.

As shown by this comparison, the differences in the number of black pixels within the tooth tissue were indeed associated with lack of vitamin D. This allows the use of this technique for the analysis of the teeth of the older people and our nearest «cousins», such as the Neanderthals or the denisovans, and to examine the conditions in which they lived and how they adapted to life in the North, and verify the patterns of evolution, which we draw their study of the «resurrected» DNA.


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