There was no one on earth originally, so how was the first woman and man born?

In various myths, the origin of the first man has been described. In our country, the first man was created by Nuwa Tuan; in Western mythology, the first man was created by God, named Adam, the first woman was made from Adam's rib and named Eve. The children born after the union of Adam and Eve gave birth to the people on earth today.

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But in fact, according to the research of genetics and genetics, these two myths are unreliable. The first is that man cannot be created from the earth, and the second is that if human beings were originally conceived by Adam and Eve, then human beings It has long since become extinct due to inbreeding.

Myths can't solve the problem of human origin, but evolution can.

evolution

In the past, people thought that life on earth was immutable, and what it was like in the past is what it is now. However, in the 18th century, people successively excavated a number of fossil skeletons from under the surface. Their skeletal structures did not belong to any animal today, but were very similar to those living today.

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In this regard, some scientists believe that this is a creature that God once created, but then God did not like it, so he initiated a great flood. The flood "formatted" the past earth, and then "restarted", thus creating human beings all the time. , Because the human body structure and mind are perfect, so human beings have always lived on the earth and have not been "formatted" by God.

In the past, scientists made such assumptions because in the 18th century, the whole of Europe was still shrouded in the shadow of religion. At that time, scientists were all believers and they had to defend their beliefs.

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But some people have questioned God, and Lamarck is one of them. Lamarck believes that the reason why the structure of paleontological fossils is very similar to the structure of modern organisms may be that they are related, and even modern organisms evolved from ancient organisms. In this regard, Lamarck concluded that the law of biological evolution is: use it and lose it, acquired inheritance.

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Taking the neck of a giraffe as an example, Lamarck believes that the reason why the neck of a giraffe is long is because the giraffe stretches its neck hard every day to eat the leaves in the high places, and it stretches its neck over time. And they can pass the elongated neck gene to the next generation, which is acquired inheritance.

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But soon Darwin came out and slapped him in the face. Based on his years of research and observation, he found that the reason why organisms are constantly changing is because of the different environments that organisms adapt to. For example, the necks of giraffes are not made longer by striving to stretch their necks every day, but there are some individual gene mutations among them. The longer necks of the individuals after the mutation allow them to eat the leaves of high trees and improve their survival. rate, so it was retained. And those without long necks may starve to death in a food crisis or evolve into other species.

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Later, Mendel, who planted peas in a monastery, revealed the laws of biological inheritance, and from the underlying logic let people know how organisms pass their genes to the next generation.

Of course, coupled with the neutral evolutionary thought supplemented by later generations, the "evolution theory" itself has also completed evolution, and how the first man came can be explained by modern evolution theory.

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Origin of the first person

Mammals appeared as early as the dinosaur period, when the ancestors of humans and mice were a family, living in the shadow of dinosaurs.

After the extinction of the dinosaurs, mammals escaped by virtue of their small size and low energy requirements, and began to prey on the ecological niche of the dinosaurs.

About 10 million years ago, the ancestors of humans were still tree-dwelling apes, and the ancestors of today's gorillas are in the same family. Only with the gradual formation of the African Rift Valley, the ancient ancestors of human beings were confined in eastern Africa by the African Rift Valley, oceans, deserts, etc., and evolved here.

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In the process of evolution, the environment in eastern Africa has changed. The original lush forests have gradually faded away, and the trees have become less and less. In order to collect food, humans have to get down from the trees and walk a distance on land before they can find them. next woods. At this time is the period of the earth ape. In the period of the earth ape, humans still have natural enemies: the fear cat, they will catch the earth ape that has no time to escape back to the tree.

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Later, forests became less and less, and humans stayed on the surface for longer and longer. In addition, humans began to walk upright during the Earth Ape period, and upright walking saves energy, allowing humans to continue to live here. Live on land.

In this way, in the Australopithecus period, humans began to eat meat, but their main food was still various plants.

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The acquisition of meat gives humans excess energy to develop other organs, and the brain begins to develop at this time. With the gradual expansion of brain capacity, human's ability to abstract thinking has become stronger and stronger, which not only allows humans to start using tools, but even start to make tools.

In the view of paleoanthropologists, those with a brain capacity of more than 600 ml are called humans, and those with a brain capacity below 600 ml are called apes, and in the period of Homo sapiens, the brain capacity of humans has reached 600 ml, so the first on earth People are "capable people".

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But human beings did not stop at Homo sapiens. After Homo sapiens, craftsmen, Homo erectus, Heidelberger, and Homo sapiens have evolved one after another. Although human beings have been evolving, there is no clear dividing line in evolution, so it is impossible to know who the first person was and when they appeared.

But in the eyes of scientists, it doesn't matter who the first person is, because evolution is a population, not an individual.