Up to now, Professor Kang’s so-called speech without topics has already had a topic, which means that humans have nothing special about them.

"Many species can be classified into the same family, just like tigers, lions and kittens belong to the family Cat family, whether they are foxes, wolves or puppies, they belong to the family Canine family."

Professor Kangda continued his lecture.

"As long as it is all animals in the same family, you can find a male or female ancestor by constantly tracing upwards. The current big lion and your kitten are the same guy who trace their ancestors back 25 million years ago."

Having said this, everyone understands that humans, like other animals, are just one species and belong to a certain family.

"There is nothing special about human beings. Human beings are also from a certain family, but human beings do not want to admit that human beings hope to be a single family, that is, human beings, and do not want any distant neighbors. But the fact is not like this. Whether we accept it or not, the human beings belonging to human beings has many cousins ​​and cousins, a bunch of apes, whether they are chimpanzees, gorillas, or orangutans, are our relatives, especially chimpanzees, which is definitely a cousin. That is to say, tens of thousands of years ago, a female ape gave birth to two daughters, one became the ancestor of all chimpanzees, and the other became the grandmother of all our human beings."

When Professor Kangda talked about this, the students on the scene became very serious.

"Do you know why we dominate the world?" Professor Kangda knocked his head: "Yes, this is the place."

"Generally speaking, the average brain capacity of a 60 kilogram mammal is 200 cubic centimeters, but what about us? There are 1,200 to 1,400. If we trace back to ancient times, the brain capacity of humans was 600 cubic centimeters at that time. It was natural for humans to survive and stand at the top of the food chain because of the increasing brain capacity." Professor Kangda was full of energy.

Of course, some people say that humans are not creatures at the top of the food chain. Yes, if you simply say, humans are indeed not qualified to stand at the top of the biological chain, but humans can do it by using their brains. I wonder what species can compete with humans now?

People use their wisdom to be unafraid of any species. How many bullets can a creature withstand a thick skin? Can a rocket launcher be withstand? The nuclear weapons created by man can even destroy the entire earth. What qualifications do other species have to compete with humans for the top of the food chain?

Humans can exterminate other species, or even themselves, but other species cannot do this.

Why are humans now deeply obsessed with their IQ? Why do they think that the higher the IQ, the better? This is because of this.

"But have you ever thought about it? Other animals are also evolving. Why are there no dogs that know calculus? Why are there no pigs that know chemistry? Why are only humans evolved into such a large proportion of thinking organs?" Professor Kangda asked again.

The students in the School of Biology are all confused, and some students in the School of Biology are also thinking, and only a few people have given the answer.

"Because a huge brain is also a huge burden."

Professor Kangda nodded with satisfaction: "That's right!"

The students in the audience focused on looking at Professor Kangda again.

"It's very good to say that a huge brain is indeed a huge burden. The brain's structure is very fragile and not conducive to activity, let alone protect it with a huge and hard skull." Professor Kangda smiled and said, "Does anyone have any idea about brain energy consumption?"

"Even when people are resting and inactive, their brains consume one-quarter of their energy."

"That's right!" Professor Kangda said: "Although the brain accounts for only three percent of the total weight of human body, it can consume 25 percent. It is still when resting and inactive. Other animals are different, and the consumption is very small." Professor Kangda said: "Because the human brain consumes a lot, people in ancient times have to pay more money. It is the first point that people have to spend more time looking for food. The second point is muscle degeneration. Muscle degeneration is not what humans want, because humans distribute the energy needed by muscles to the neurons of the brain. Therefore, in ancient times, chimpanzees could not beat humans in the 'reason' link. Of course, if humans fight with chimpanzees, they will definitely be beaten to death, and being torn to pieces are common."

There was an uproar in the audience.

"There are gains and losses. If a human is a strong enough brain, it must pay the price of other physical functions degradation. This is why people who work in brain work will become weaker and weaker if they don't go to the gym to do effective systematic training. People who work in physical activities do not need to go to the gym to exercise and have muscles. It is because people who work in brain work have unknowingly converted the energy needed by your muscles to their brain, so their bodies will become thinner or obese. As long as you cannot do systematic exercise in the gym, this is inevitable."

Professor Kangda's words made many people nod their heads frequently.

Because what he said makes sense.

Although people who work in mental work seem to sit there for a day without moving, their bodies will feel tired. People who do not work in this kind of work obviously cannot understand the "tiring feeling" and will think that mental work is much easier than physical work. In fact, it is not easy.

There are only three types of people in the world, those who use their brains, those who sell their physical strength, and those who achieve nothing.

If a person does not want to achieve nothing, he or she will either use his or her brain or use his or her strength, and he or she will definitely gain nothing.

"The reason why people can successfully stand at the top of the food chain today and dominate the world is a very painful price." Professor Kangda sighed: "While evolving the brain, we need to walk upright on both legs so that we can improve our vision, and be free to do other things, produce, and make tools. Just standing up and walking will cause great pain to mankind."

Speaking of the evolutionary history of human beings, it is really sad.

Many students were silent.

The reason why humans can succeed is that they have worked hard.

And now, if you don’t want to work hard, how can you succeed?

This is the case for the entire human being, and the same is true for individuals. If you don’t give, you will never gain anything.

"Our ancestors have evolved over millions of years to develop a skeleton with relatively small heads while walking with limbs. It is not easy to adjust this skeleton to be upright and to support a huge head?" Professor Kangda said: "So in order to be able to look far and to be able to use hands flexibly, our ancestors must develop into independence. This is why people today also have the root causes of back pain and cervical spondylosis."

Hearing this, many people unconsciously touched their cervical spine.

Nowadays, most people have mild or severe cervical spondylosis and back pain.

"This is the price of becoming a 'ruler'!" Professor Kangda said seriously: "What's even more terrifying is that walking upright will narrow the buttocks and limit the width of the female birth canal. What's more, humans are still evolving and infant brains are getting bigger and bigger, so it is normal for childbirth to die. For this reason, humans have evolved into a 'premature birth' species."

Many people lowered their heads and whispered to discuss whether Professor Kangda's words were correct or not.

In fact, whether it is correct or not, there is some reason, because only premature birth can make the baby's head smaller and softer, and the birth will be smoother, so humans will choose to give birth in advance. This is a natural choice and is needed for species evolution.
Chapter completed!