People continue to evolve

New research on genetics has confirmed the Darwinian theory of evolution in species, and the object here is human.

Ordinary people have boomed into superheroes in Hollywood movies like Heroes and X-Men. In fact, humans seem to have yet to suffer from a violent mutation to possess power such as reading thoughts of opposite people or flying like birds. However, the scientific community has found evidence that human evolution is still going on, and a recent report in the Proceedings of the National Academy of Science provides some valid evidence. this process.

Tibetans are one of the most evident evolutionary cases to suit the environment on a height of 4.900m above sea level.

Experts from the University of Quebec studied a very detailed population database of the Ile aux Coudres region, a tiny island located northeast of Quebec City, from 1799 to 1940. Data allow The scientist tracks the age of female inhabitants at the time of their first childbirth. Among these people, the average fertility age is from 26 to 22 years old. The study confirmed the idea that the younger the age of childbearing, the greater the genetic change due to natural selection mechanisms. In other words, the trend of reproductive age rejuvenation is the result of genetic characteristics, while evolution means that organisms change over time based on these characteristics.

'This is the first study to show a genetic response to natural selection in the recent population context , ' said evolutionary biology professor Stephen C.Stearns of Yale University. review This change is more likely due to reduced mortality, Dr. Stearns. Good hygienic conditions, adequate vaccines and medicines have improved health and enhanced infant survival. This seems to be related to the change in fertility in women who had previously had successful children.

The study also coincided with previous studies, suggesting that human evolution is still ongoing. Until recently, scientists have argued that humans still do not make major changes in gene structure since ancient Greeks or even beyond.'But there are signs that we are still changing, albeit slowly,' said Dr. Stearns, who conducted a similar study in Framingham, Massachusetts.

It is known that Tibetans in the Himalayas have evolved to better adapt to low oxygen status within a few hundred generations, according to a study published in Science last year. Other studies have also shown that adults in Africa and Northern Europe have developed the ability to tolerate milk sugar in their diets between 5,000 and 6,000 years ago. According to experts at the University of Maryland, this evolution is related to culture that relies on milk from their cattle.