What are the meanings of walking upright, using fire, and using tools for human development 10

First, the meaning of fire.

1. Eating cooked food is easy to absorb, so that the ape man obtains more abundant nutrition, cooked food and boiling water make the ape man less sick;

2. Slash-and-burn farming, fire promotes the development of agriculture and increases yield; The use of copper, the use of iron, and the invention of pottery are all inseparable;

3. Fire is the most advantageous tool for primitive people to drive away insects, snakes and beasts in the dark night;

2. As for the factors that play a positive role, we often mention labor, which not only exercises the ape-man's body, but also the ape-man's brain. The body and brain accumulate from quantitative changes to qualitative changes, and at a certain moment, human beings are born. But I think natural selection.

The role is also very large. Natural selection has screened out the anachronistic genes of ape-mans and is a very effective genetic filter. Then there's the natural environment.

The end of the glacial period brought with it an abundance of food. Therefore, I think the main factors are: 1) labor (or survival process), 2) natural selection, and 3) suitable living environment.

In the Paleolithic period.

The main productive activity of humans is hunting. At that time, primitive humans used beaten stones and sharpened wooden sticks to throw at various prey, but the throwing distance was limited. Later, it was found that the wooden sticks were bent and deformed by external forces, and once the external force disappeared, they suddenly returned to their original state and produced greater energy, so they selected elastic wood or bamboo and fixed them with tough string bending, making the earliest bow and arrow in human history**.

For the primitive clan tribes that were mainly hunting at that time, the application of bows and arrows was of great significance.

From the perspective of archaeologists, it represents the evolution of man from Australopithecus, marking the birth of humans. But from another point of view, this is the reason why the apes were forced by life to live on the earth and see the birth of humans. Rapid evolution of man, beginning to be able to work and hunt with his hands.

Australopithecus, about 6 million years ago, is the origin of the earliest human ancestor recognized in modern times, that is, the origin of humans First appeared in the southern part of the African continent, it was the first hominid, which began to erect After that, hominids gradually separated from apes

Homo sapiens, about 1.5 million to 2.5 million years ago, one of the branches of Australopithecus evolved into homo sapiens, which first appeared on the east coast of Africa Able man means a person who uses tools and can make tools, that is, the so-called early ape man is the earliest hominid animal The beginning of the Paleolithic period; After hundreds of thousands of years of evolution, Homo erectus eventually died out by a new species of human: Homo erectus Homo homo homo and its descendants, Homo erectus, coexisted for a period of time

Homo erectus, about 200,000 to 2 million years ago, first appeared in Africa, that is, the so-called late ape-man, began to know how to use fire, began to use symbols and basic language, about 1 million years ago, the ice age came to come, Africa began to grassland, Homo erectus had to start migrating, expanding to all parts of the world, and were distributed in Europe and Kia and Africa (Heidelberg man, Guava ape, Peking man all belong to Homo erectus) Note: At this time, humans walked out of Africa for the first time About 800,000 years ago, Homo erectus came to what is now Spain and became the first European, that is, in modern times About 200,000 years ago, Homo erectus in Eurasia and Africa gradually disappeared and was replaced by a new species of human beings in Africa for the first time: Homo sapiens

Homo sapiens, the equivalent of the current human race, appeared 200,000 to 10,000 years ago, and not only were they completely erect, but their brain volume had reached the size of the modern in, which was 1,360 ml on average, which marked the development of their intelligence to a higher level, but they have survived and evolved on their own, and finally evolved into the modern in

Walk upright. Because human beings learn to walk upright, they will learn to use tools, and walking upright is the premise of using tools, so walking upright is the most important skill of human beings.

Both are very important, if you have to choose one, the use of tools is more important, after all, the use of tools means that you have the ability to survive, and you can develop better with the ability to survive.