Upright, upright,
Walk upright...
Regarding the evolution of human beings, the most attractive thing for scientific workers is the change in brain volume.
The most distinctive thing about human ancestors is that they had a clever brain. The fossil manifestation is the brain capacity.
Therefore, the larger the brain capacity, the more perfect the function of the brain, the closer it is to modern humans.
Based on the fossil skulls found by archaeologists, scientific workers have distinguished and named ancient humans.
Ancient humans dating back 3 million years ago, collectively known as ape-man, had a brain volume of about 400 milliliters.
Ancient humans from 3 million to 1.8 million years ago are called capable people. The brain volume is about 700 ml.
Ancient humans dating back 1.8 million to 300,000 years ago were called Homo erectus. The brain volume is about 1000 ml.
Ancient humans, between 250,000 and 40,000 years ago, were called Homo sapiens. The brain volume is about 1300 ml.
As for modern man. The brain volume is about 1500 ml.
Follow this classification method. The world-famous Beijinger, scientifically named Homo erectus Beijing. The cave people on the top of the mountain are classified as Homo sapiens.
Once the anthropological community, the British anthropologist Arthur. Sir Keith's standard definition of human genera.
The brain volume of human animals is set at: equal to or more than 750 ml. Once enshrined as a criterion, it really existed, the demarcation criterion between human and ape brain volume.
This information is obtained thanks to a well-developed network.
Today, we have a range of data at our fingertips. It is condensed with the ingenuity of scientific workers and soaked with the sweat of their hard work. It is precisely because they are not afraid of hardships and hard work, silently cultivate and selflessly dedicate, that they have a smooth path for the development of science today.
The predecessors planted trees, and the posterity cooled off. While the posterity is cool, it may as well continue along the road opened by the blue wisps of the previous people's yanlu road. Or plant some trees on the side of the road to facilitate the future generations to cool off. Or expand forward, so that the scientific road of future generations can go longer and farther.
But don't forget Aristotle's famous quote: I love my teacher, but I love the truth even more!
If, the former people went in the wrong direction. There is no need to superstitiously believe in authority and go on. After all, the predecessors were not gods, and they did not have absolute prejudgment ability.
At this time, take the wrong road, and then turn from the posterity to the right direction. This is not only the embodiment of the scientific spirit, but also the greatest tribute to the predecessors of the workers.
The above classification method is like this.
Judging the degree of brain development of human animals based on brain volume is not wrong in scientific reasoning.
However, the naming method behind it has drawbacks.
Former scientists were more superstitious about the function of the brain. They believe that the brain played a dominant role in the process of human evolution. According to this inference, after the brain matures and develops, there are feet upright and there is upright walking.
Thus, in the naming of different stages of human beings. First of all, the brain capacity of close to 750 ml of ancient humans, called able people. Skilled craftsmen, tools-making, ancient humans with clever brains.
Because of their dexterous hands and developed brains, the next stage of ancient humans learned to walk upright. So there was Homo erectus.
It turns out that the brain's abilities are overrated, and they obviously miscalculate.
The most important evidence is the discovery of an ancient human fossil in Ethiopia in 1974, the famous Lucy.
The fossils of this ancient human remains date back about 3.2 million years. Her brain volume is only about 400 ml. According to the previous classification, it should belong to the ape man. However, according to the skeleton information, the people have begun to walk upright.
This leads to a typological error. Ancient humans, who were supposed to belong to ape people, continuously crossed the two classifications of ancient apes and nohs, and directly had the characteristics of Homo erectus.