Human evolution has always interested people.They have been around for tens or even hundreds of years studying the theory of the origin of life on Earth.Assumptions about this a lot.The most popular version is the one that describes the origin of humans from apes and stages of human evolution.
Even in ancient times there were two points of view on this issue.The first theory is called abiogenesis.She argues that there is the possibility of living from the nonliving.Another theory involves the inability of independent origin of life.There are other options: for example, the creation of life on Earth by God.Let us consider more thoroughly the basic stages of human evolution.
Man has long tried to study their ancestry.This is reflected in the legends, tales, epics of almost all tribes and nations.
only in 1859 published a book of Darwin, which describes the origin of species due to natural selection.It caused a sensation and aroused great interest.Many criticized his theory, criticized and ridiculed.But people close to the science, admired this creation.
This book describes the natural origin of man.It also leads and evidence, based on scientific knowledge.They spoke about the relationship of man and mammals at the genetic level.Over time, there were followers of Darwin, who began to study the stages of human evolution.
man and some vertebrates have common structural features.For example, especially the nervous system, skeletal, digestive, respiratory and circulatory.This is most clearly evident when considering the relationship of the embryo.
Special features are the rudiments and atavism.They are present in the body in large quantities, but are useless.This legacy left over from animal ancestors.If we look from the perspective of human biology, it is a mammal of the suborder higher related to primates.But people - being reasonable.The greatest similarity can be seen in humans with apes, the difference between them is the ability to work and apply tools.
stages of human evolution include the period when there is a natural selection of individuals capable of operations using guns.Further, the transition from the application to the production of objects of labor.It was natural selection that occurs as a result of evolution.Eating food prepared with the use of fire, reduce the burden on the digestive system.Gradually, it has undergone several changes (become shorter intestines).
There are three stages of human evolution.
1. The emergence of the genus Homo, which was the first creature Australopithecus.This is the stage of the biological revolution.
2. This is followed by the next stage in the evolution of this genus.It lasts before the beginning of the modern stage of human evolution.Here, this process has an impact not only biological factors, but also social.Among the representatives of this period can be identified Pithecanthropus, Heidelberg people Sinanthropus and Neanderthal.
3. The final step is considered to be the evolution of modern humans.Here, the most affected by the social aspects of existence.
The first traces of human activities with the use of tools found in the period of 2.5 - 2.8 million. Years ago.It is also known that many human populations are not replaced each other as a result of evolution.They existed at the same time and disappeared as a result of the struggle for survival.
Man - this is a sentient being that has both biological and social features.This distinguishes it from other creatures living on the planet.
