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When the Earth began life?

The whole history of the Earth is divided into 2 main periods - cryptozoa and the Phanerozoic. Cryptococci period is counted from the moment Vozniknovenie our planet (4.6 billion years ago). This period saw the formation of the earth's crust, ocean, began living organisms. Cryptozoic is conventionally divided into archaea, or archeozoic, and the Proterozoic. The duration of each of them is about 2 billion years.

When archeozoic on our planet has favorable conditions for the emergence and development of life. Life on Earth appeared not later than 3, 5 billion years ago. The first living organisms were the simplest structure. But as a result of natural selection was surviving organisms better adapted to their environment. This led to more complex life forms.

At the beginning of the Proterozoic period in the waters of the World ocean lived algae and the first multicellular organisms: sponges, coelenterates, mollusks, and worms.

The Phanerozoic is divided into the Paleozoic, Mesozoic and Cenozoic era.

In the period of the Paleozoic spill occurred seas, and a single continental block fell apart, which was later developed into the modern continents. At the end of the Paleozoic died out many primitive plants and animals.

For the period of the Mesozoic era flora and fauna became more progressive and varied forms.

The Cenozoic era was an important step in the development of the Earth. In this period of insectivorous animals evolved primates, from which people and the earth's surface gradually became modern shape.

 


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Total votes: 102

Your comments:

Alexander
2013-11-30 19:46:18
For a long time already all scientifically proven! Read more and teach elementary science! Not morochte children head with their religious knowledge, they don't need! Because the religion of humanity and so much has stalled in development! In 1997, the Church officially recognized the earth is round ))
Ghoul
2013-10-27 10:46:04
Gunit, the beginning was good and promising. And then... Even in terms of literacy...
Gunit
2013-10-22 19:30:28
We will begin to refute the theory that man was from monkeys: 1) was Not found remnants of man in the evolutionary period. 2) Why is monkey turn into a man. I will give their own version.
To receive the very many things that people notice the alien ships. I think at the genome level, inoplanetjani created man and landed on our planet because our planet suitable for life. And at the moment they are watching our development. My version some will seem crazy. Well it is logical, then everything is clear whence man came.
About the aliens, there is information in Egypt that they helped them and cost pyramids for communication with us. Today, no one machine can't pick up the plate weight on, and the pyramid of Cheops plate Semo on. How, then, Egyptian raised plate? It seems to me a reasonable solution alien technology. The pyramid also resemble the shape of our radio.
toffee
2013-09-26 18:36:33
I believe that man was created Boga all the color variety was founded geneticheskiyku and primates still prematurely if we evolved from monkeys randomly,then the question arises :"why do people last stage of evolution? Why monkeys now not evolve?And in General in the human body operate such complex mechanisms and systems that to imagine that all of this occurred without the intervention of the mind is simply impossible!
Irina
2013-05-05 20:42:54
Personally, I was helped by this website.
Natalia, I am not confident that all humans descended from one man and woman. If so, then everyone should have the same DNA. Many people know that when mixed kindred blood are obtained genetic freaks. And how do You explain the appearance of dark-skinned people, i.e. blacks?
In General, You do not want to believe that everything evolved from primates.
And no need to write that this is nonsense!
Alexander
2013-03-09 11:08:04
Yeah let's fool the children of the head of the Hebrew kazakami !
Lana
2013-02-24 00:06:23
Bravo, Natalia!
No need to fool kids head!
And by the way, all these scientific hypothesis is still not proven!!
Natalia
2012-10-25 06:36:36
Nobody on earth knows how the World exists. Just after Christmas, more than 200 years. And the man certainly didn't come from animals. Everyone knows that the first people God created a man and gensini first they lived not even on earth ,and in Heaven. Later, because of their sin, they had to live on themlet them and all the others were born ladiest this man is the Prophet Elijah. HE DID NOT DIE , BUT WAS TAKEN BY GOD TO HEAVEN (AND DON'T KNOW WHAT DEATH)
Alena
2011-03-09 05:53:00
little information

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