Austrian Research found that husband and wife are the evolutionary need

Sina technology news Beijing Time on August 29 News, according to the British "times" report, scientists from the University of Vienna in Austria, research found that older men will look at the young girl, women like more mature men. These practices actually follow the natural law of "competing for things and survival of the fittest. That is to say, when we select objects of choice and marriage, it is just an evolutionary result that people prefer the opposite sex of a certain age group.

The study found that the natural law of "competing for things and survival of the fittest" guides and controls the age requirements of both sexes in a complementary way. Both men and women raise more offspring if they are older than women. The Austrian study shows that if combined with a female 6 years younger than herself, male reproductive capacity will be in the optimal state, while for female, if a spouse is 4 years older than herself, they will have more children.

Interestingly, one of the most successful and most famous "productive" marriages in the UK is in the middle of this age. The 81-year-old queen of England was four years and ten months younger than her husband, Prince Philip, Duke of Edinburgh. They raised four children in total, twice the UK average.

However, couples with older husbands do not have a reproductive advantage. If a husband is 10 years older than himself, the couple have the same number of children as the men who are five years older. These results provide the most powerful evidence: In most human civilizations, the "old man and less wife" combination of heterosexual couples has evolved into a standard, the reason is that this combination can bring a fertility advantage.

In England and Wales, 26% of couples are younger than their wives. In contrast, the ratio of a husband who is five years older than his wife is 48%, and the ratio of a husband who is six years older is 26%. Although similar trends are also presented in other regions, the average value of age gap is often different. The standard of "old husband and wife" does not exist. On average, men all over the world prefer female 2.66 years younger than themselves, while women prefer men 3.42 years older than themselves.

The analysis of the world's marital records also draws a similar conclusion. For a long time, this cultural identity has given scientists a kind of suspicion, possibly as a result of evolution. The historical experience tells us that age differences can breed more offspring, and more children will live in this world.

The common explanation for this phenomenon is that male prefers strong reproductive partners-and is an instinctive preference, and the requirements are naturally met by young girls. In contrast, women are more keen on men who pursue wealth and have a high position, and what meets this requirement is obviously older individuals. Although this theory is true, in the real world, previous studies have not found that male's choice of "less wife" or female's choice of "Old Man" has any reproductive advantage.

This new study, conducted by Martin Federer and Susan harpur from the University of Vienna, Austria, found evidence for the first time. To achieve this, they studied and analyzed the databases of more than 10 thousand Swedish couples. All participants have children. From the first child to the last child, they all live with the same partner. Specific findings are published in biology Express.

For men, the average number of children they give birth to increases as their partner ages drop. The maximum age difference is 5.92 years, but when a larger age difference appears, this growth shows a downward trend. Similar findings are also found in women. The average number of children they give birth to will grow with the age of their partner, and the maximum average age difference before the decline trend is 3.97 years. This difference between men and women may be because this pattern does not include every couple.

If the wife is older than their spouse, the curve changes significantly: the number of children given birth will rapidly decrease as the age gap increases. The main reason may be that female's fertility tends to decline at an earlier stage. If a woman is 10 years older than her partner, she may become a real family when her fertility declines, however, this phenomenon does not often occur in an older man.

These findings show that the age difference between husband and wife is clearly a result of evolutionary "appropriateness. When men are older than women, more children will come to this world. The two scientists said: "The findings may explain this phenomenon. Men prefer women younger than themselves, while women prefer men older than themselves. We believe that, for men and women, the age gap can improve the adaptability of individuals, which may be a feature of evolution ."

Two scientists said the study also found that, for both men and women, when they gave birth to the first child with the first companion and then joined with the second companion, their second partner is often younger than the first. This may be a reflection of the priority, that is, younger partners can make up for a person's declining fertility. (Yang Xiaowen)