The history of the earth is very long, about 45 years! Now we talk about life on the earth, but there is no life on the earth for a long time, only some substances, such as some inanimate substances, such as elemental carbon. But after a long period of evolution, some single-celled organisms, such as cyanobacteria, began to appear, and then many cells appeared, and then after the dinosaur era.

Finally, mammals appeared, and then the ancestors of human beings, apes, began to appear. A great man once said that apes, people in the process of formation and fully formed people can be regarded as three stages of human formation. Ape refers to the ancient giant ape, the ancestor of human beings, while the man in the process of formation refers to the evolution from ape to man, who has been able to run on all fours and know some languages, and later man refers to modern people.

It took hundreds of millions of years from ape-man to modern man. From the unknown to the known, human beings have experienced too many hardships, such as floods and volcanic eruptions. At the same time, they also received gifts from nature, survival skills, and the desire for life. Early humans evolved through exercise, making their limbs relaxed, and their hands and chest gradually became the same as those of modern people, but their heads were still big and hairy, and they looked dull and heavy.

Early humans in Germany had such characteristics. In the middle and late period, human beings gradually became homo sapiens, that is, pure wisdom and personality, strange psychology and activities. They are almost like modern people. The hair on their bodies has completely disappeared. Without heavy bodies and heads, early humans around the world began to gather.

For example, Zhoukoudian in Beijing, Savages and Mongols in Australia, they began to flock, began to adapt to the climate, began to learn, began to find suitable habitats, and began to make sounds. In the later period, mankind began to work, get paid through labor, and began to enjoy the fruits of labor. They learned to use fire, and used it to drive away wild animals and attack them.

According to a survey, early people in Beijing have begun to use stones, grinding them into attack weapons, which is both sharp and convenient. Stones are also ground into decorative clothes. Early people found that bones were also hard things, so they began to collect aggregates as weapons and daily necessities. People use them to dress up their lives and get prey. The collective activities of early human beings also created collective achievements.

In some human heritage parks, archaeologists have discovered a large number of behemoths, which leads to the conclusion that early humans have been able to survive and reproduce. Human beings have acquired survival skills and experience through collective labor, and labor has developed human minds. Gradually gaining wisdom, collective labor also makes people have a concept of the group, generate dependence and trust, and know how to unite.

Let people know that a person's strength is very thin, but the group's strength is great. Group work has developed people's language, and people begin to communicate with language instead of body.