Among a huge variety of the world of living beings only the person has reason thanks to which he survived and remained as a species. The person left the nature and remains its part. It in many respects defines its features as animal.
The biological human nature was formed for 2.5 billion years. Evolution took place such periods in formation of the person as the Australopithecus, the pithecanthropus, sinantrop, the Neanderthal man, kromanyonets and the person modern. At the same time biological ancestors of the person appeared not one by one, and, being allocated a long time, lived with the predecessors. If to return the modern person in fauna, then he will get beaten in fight for existence and will be able to live only in rather narrow strip of the emergence – in the tropics located on both sides from the equator. The person has no warm wool any more, he has weak teeth, nails instead of strong claws, unstable vertical gait, predisposition to many diseases, poorly developed immune system. And still the person remains to animals. The human body develops under laws, the general for all living beings. For activity maintenance it needs oxygen, food and water. As well as all living beings, the person undergoes changes, grows, grows old and dies. Process of reproduction at people proceeds to similarly this process in fauna, and transfers of signs of a look by inheritance are the cornerstone universal genetic regularities. Superiority over animals is biologically provided to the person only with existence at it of a cerebral cortex which consists of billions of neurons. Their functioning serves his consciousness, ability to work and life in society. At the same time the person is a biologically not repeated organism, structures of its genes are various. It is counted that among the people living on Earth was not any identical to another. The human body is not the person in social sense. The child growing separately from people will not learn to speak, his thinking will not be developed. The biological nature is the only basis on which there is a person. Each person lives since then and until while there lives his biological nature. He is born only as an animal look. The newborn biological being of the person just should become a person in the true sense of the word.