Today's article is about the evolutionary history of some aspects of men, but whether it is evolution or not, this has to be decided by you, because there must be many people who think that today's men are still degenerate compared to before! In the million-year-old life of the human species, from low primates to higher primates, constantly adapting to the living environment, constantly evolving and perfecting themselves, just to be able to survive and better survive, then in this process, males have made a huge change in reproduction, you know?
<h1 class="pgc-h-arrow-right" data-track="4" > boneless "chicken" claws</h1>
In the long process of human evolution, human beings have degenerated many things, including the loss of two more important bones. One of them is the thick and long tail, because humans have learned to walk upright, according to Darwin's principle of use of advance and retreat, there is no need for a tail to control the balance, and the arm has become long enough to clean the ass, and gradually the tail has been introduced to the stage of history. In addition, relative to the front of the tail, humans have lost a thick and short bone, that is, the penis bone.
Yes, you heard it right, it is a bone in the male tintin, and perhaps today you will feel that they are far away from us, very strange. But if you're a good believer, you'll find that this physiology exists in many mammals, such as your cats and dogs, and the only primates who lose this bone are spider monkeys and us humans, which are truly boneless "chickens."
<h1 class="pgc-h-arrow-right" What is the penis bone > data-track="8"? </h1>
As the name suggests, this is a bone that grows inside Tintin. It is also known as a rod bone, the magic is that it is a relatively independent bone, not linked to the bone, the penis bone of different animals is also very different, whether in size or shape, from the following figure we can clearly see that these bones have cylindrical, barb-like, and even trident-like, the length also ranges from a few centimeters to tens of centimeters, of which the walrus's tintin bone can reach 60 cm long.
<h1 class="pgc-h-arrow-right" data-track="12" > the role of the penis bone</h1>
We know that the common ancestor of humans and primates was mammals that appeared 145 million years ago, and that the penile bone was evolved at that time, and scientists have summarized these reasons:
1. Stimulate female ovulation
In some felines, such as lions and cats, when they mate, the female has a special place, if not strongly stimulated, the female will not ovulate. Then for any species, reproduction is the most important, so they have evolved bones in the genitals, so that they can better stimulate female ovulation and achieve the purpose of fertilization.
2. Extend the mating time
If there is a bone in the genitals, it can greatly prolong the staying power of the male animal, and the human cavernous body and the blood that makes it erect are small in front of the bones. The long-term mating of animals is not only a process of enjoyment for male animals, but also a good way to prevent sperm from sneaking away from the female.
Logarithmic plot of mating time and body weight in mammals. Each point represents the average number for the entire primary group. Marsupials are characterized by very long mating times
3. Reproductive protection
In the process of animal reproduction, whether it can effectively prevent other males from interfering with themselves is also a very important issue. So some strangely shaped penis bones are designed to scratch the female's vagina after mating, so that she can no longer mate with other males, which really destroys it and can't let others get it. There are also hook-shaped bones that are meant to hang DNA left behind by the previous mater from the female, increasing their chances of reproduction.
<h1 class="pgc-h-arrow-right" data-track="22" > such a powerful thing, why do humans degenerate? </h1>
One of the first problems to consider is that in ancient times, people were not strong, and all kinds of bobcat beasts were prevalent, and this side was enjoying several hours of mating, and it was directly eaten by predators who had been secretly ambushed for a long time.
Therefore, it is better to hurry up, after all, compared to being able to reproduce, it is okay to be less happy. Therefore, the mating time has become more and more the mainstream of society, and people have become fast guns one by one.
Mammalian evolutionary tree, red = all exist; pink = most exist; fuchsia = few exist; gray = non-existent
The second is the mate system of people, in mammals, only 3% are monogamous, and humans are one of them. This morality restricts everyone from mating with other members of the opposite sex except their own spouse.
Of course, this moral constraint is sometimes not effective, but in most cases women only give birth to their current husbands, so the competition for mate selection and reproductive competition faced by men is negligible, and they do not have to worry about their DNA being replaced by others.
Yale Professor Richard Plum believes that this situation is also related to the preferences of primitive women, and he once proposed a hypothesis that when the human penis bone disappears, the penis and scrotum are integrated and become a community.
For example, although gorillas and chimpanzees look incredibly strong, their penises are only 3.18 cm and 7.62 cm long when they are in combat, while the average length of humans is 12.5 cm.
Dr. Brian-Mautz made a statement in 2013 that when humans do not understand shame, they will not wear clothes, and the huge scrotum and Tintin flutter with people's movements, wandering around, which is also an important reason for women to choose a spouse, "I will be with you when you look good", perhaps this is the general psychology of women at that time.
The loss of the penis bone can provide more space for the growth of Tintin and the scrotum, and also achieve the hanging style of male lifting and hanging garlic. This form of courtship is also present in today's long-tailed monkeys, and the male genitals are particularly beautiful, so that they can conquer the females to come and mate.
<h1 class="pgc-h-arrow-right" data-track="39" > can we go back to the time of tintin bones? </h1>
In order to prevent too many people from sending me private messages and asking whether they can still grow ding ding bones, I will reply to it in a unified way here: It is impossible to dispel this idea as soon as possible. The results of human genome analysis at Stanford University showed that about 700,000 years ago, human tintin bone was no longer visible, and there was no tintin bone DNA in the body. The ancestors of human beings were divided into two categories, one was homo sapiens, the ancestor of human beings, and the other was Neanderthals, and before them, the artifacts that could make men last so long had disappeared.
The picture shows the primate evolutionary tree, showing the presence/absence of tintin bones. Red = present; blue = non-existent; lilac = ambiguous.
After reading this article, perhaps many male compatriots sighed that it was not the right time to be born! In fact, there is no need to worry so much, I tell you a wise saying: use it in and out, or if you think about it, if there are still bones today, is the fracture another headache?