Why do women live more than men? These scientists have found an answer

Many scientists throughout history wondered why women live more than men. This is a fact, however, the other expected life expectancy is in different parts of the world, what women are usually higher than in men. This It also remains if we return to the pastThe field was as much as the mortality of young people was much older than now, more men have always died than young women. Even in other primatesLike gorillas, women usually live more than men. There are many hypotheses about why all this is happening, many of them with great consistency. Nevertheless, there was still no excellent study to analyze this problem from an evolutionary point of view.

Just the fact that other primates and Also other mammalsfollow the same scheme, led to International team of scientists To study why women live more than men with their attention, focused on our Evolutionary history Therefore, they studied other species, Some are connected with us than othersThe field is especially focused on the species Mammals and birds And the reality is that this way to pull out a little out of the box helped them to perceive the prospect and better understand that all this can be.

They found that from an evolutionary point of view, some existing hypotheses still They get even more senseIn addition, they found others who can also explain everything to the field. And deep down, most likely, one factor should not, but a combination of several.

What is known about why women live more than men?

Basically, there are three hypotheses about why women live more than men. Firstly, many scientists rely on the chromosomal problem. Both men and women have the same chromosomes, with the exception of a couple, known as Sex chromosomesThe men’s sex chromosomes – XY and female XX. That is, women have two x and one and one Y. Men and women CIS.

Many important genes for survival are on x -chromosome. If in one of these genes there are mutations in one of their chromosomes, it can still be Option without mutation on another x chromosomeI could provide this absence with a field. On the other hand, men do not have another x chromosome to compensate for these problems. Is the reason why most Diseases associated with the chromosome x They are more often in men. For example, this happens with DalthonismThe field is still much more than daltonic men, because for a woman they inherit two x chromosomes with a mutated genome. The probability is much lower. Of course, there are cases, but this is less common. In this case, the colors are simply embarrassed. This is not serious. But there may also be more serious consequences that reduce The life of male life.

What is the rest of the hypothesis?

There is a hypothesis that women live more than men, because they have Less testosteroneThis hormone, much more common in men, is usually closely related to impulsiveness. Sometimes impulsive behavior is dangerous. There is nothing more to see a large number of video on YouTube, which, like humor, are called “Why men live less.” They usually come out in them People commit recklessness This is the end in the accident. But that’s not all. It was also noted that testosterone could negatively affect The immune systemThe field is why, in some cases, certain infections more affect men.

All this was also noticed in the nineteenth century with a very curious study in which the Korean scientist, Han-nam ParkI analyzed the records of the Imperial Court of the Chosun dynasty. First of all, he focused on comparing life expectancy 81 Eunucos With such people in court. Thus, he saw that Eunucos lived on average around 70 years, While the rest of the men was about 50 years old. There were even three eunuchs that exceeded 100 years. Since Eunucos has no testicles, it is likely that a low testosterone had to see.

Historically, male habits are usually more harmful than women. Small more, drink more alcohol, they go less to the doctor … This can explain why women live more than men, although the reality is such that these are habits that change strongly, while the differences in the expected life expectancy are preserved.

What does evolution have to do with all this?

To try to give an evolutionary explanation of why women live more than men, authors of the study that has just been published analyzed More than 1000 records of birds and mammals of different species.

They observed interesting data confirming some hypotheses of the above. For example, differences in chromosomal differences. They saw this, although women usually live in mammals, The opposite usually occurs with birds. But they also saw this, while the rest of the mammals distributed sexual chromosomes, like in people, in Most birds are Men who have two identical ones, and women who have one at a time. That is why the opposite is happening.

This is perfect for hypothesis Double X protectionOf course, they also saw the field that there are some species in which this pattern is not supported, so it is clearly more connected with the factors.

What can these factors be?

They believe, observing these animals that one of these factors can be The need for mating. In polygamous species in which it is important to be a suitable man, men usually have a much lower life expectancy than women. The authors believe that the largest size or colorful plumage increases mortality. This can be, for example, because to maintain this facade, energy is removed into important processes for survival. IN Monogamous birdsOn the other hand, there is no such big difference, so everything is blocked.

As well as the fact of raising children. The species with young ones spend more time with their mothers, the expected life expectancy of women is greater. They must remain healthy to take care of their offspring.

There are not many things in the zoo

These scientists also compared animal zoo with copies of their species grown in freedom. They observed that, although the zoo reduces Gender gap in life expectancyThe difference is minimal. Therefore, we are more likely to an evolutionary problem than the environment. And, as such, this can affect people. This may not be as visceral today as our ancestors, but evolution is capricious.

What is clear is that perhaps all hypotheses have a little truth. There are many reasons why women usually live more than men. Some will change a little, but others, perhaps stay over timeThe field in any case, hoping that the expectation of life is increasing much more for everyone and, above all, all over the world.