the Human brain is still evolving

the Human brain is still evolvingThe quite modern for biological standards of the people who lived around 4000 BC, the brain continued to evolve, developing, say geneticists. And, probably, this is happening now. The consequences of "mutation" is not yet clear. But some experts say that in the past this led to landmark changes: exactly, in their opinion, the writing appeared and the city. Experts at the University of Chicago, headed by geneticist Bruce LAN examined two genes that regulate the growth of nerve cells in the brain. It was found that they significantly influenced the contents of the skull and after modern man has formed in biological terms about 200 thousand years ago. In a study published in the journal Science, says that the brain continues to grow and the people who lived 5800 years ago. This is probably happening now. "We all, including scientists, evolutionary plan something like algae," says Bruce Lahn. Agree with his colleague Greg Wray, Director of the Center for evolutionary genetics: "Some people believe that man is the pinnacle of evolution. But look at it another way: it is almost impossible to imagine that evolution suddenly stopped". LAN, however, recognizes that a more detailed study, as it is still unclear what effects had a mutation of the brain on the development of society. Lang suggests that landmark. If we are to believe his theory of "molecular clock", it is the genetic changes brought mankind to such discoveries as cities and writing. In the pages of Science LAN share with colleagues the results of their research two genes microcephalin and ASPM. If these genes are "not working" on the stage of the formation of the body, the child-Microseal is born with an abnormally small brain. Analyzing DNA samples from different populations of the team Lana identified several distinctive variations of these genes. They are repeated so often that they need to consider not random mutation and natural selection as "mutated" individuals have gained an advantage over their fellows. Very quickly "mutation" has become the norm. The team of scientists also wrote a computerized statistical model, which tried to compare the date of possible changes in genes, brain and historical events. In particular, according to lang, gene microcephalin became active around 37 thousand years ago. At about this time there appeared the notion of art, music, and spread the first working tools. Gene ASPM "mutated" about 5800 years ago that in the model Lana well corallium with the development of writing, the spread of agriculture and the formation of cities. "Genetic evolution of humans in the very recent past, to a certain extent may also be associated with cultural evolution," concludes Bruce Lahn. However, in the scientific community these conclusions are treated with great suspicion. As the Director of the National Institute of human genome Professor Francis Collins, no one yet has failed to prove that the genetic changes make the creature more intelligent, educated and quick-witted. Yes and mysterious statistical model Lana, details about which scientist is not yet reported, forcing colleagues to doubt the validity of his conclusions. In addition, as it adds Vray, it is naive to believe that brain development may be due to only two genes. These genes, according to him, a lot, besides a large role in shaping the personality plays a child's environment. Рђssociated Press (Russian text NEWSru.com).



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