Era of the Earth

In one of the corners of the cosmos many millions of yearsback there was a powerful explosion. As a result of such a shock, the star, which had long since outlived itself, looked like a huge cloud. It rotated and destroyed around itself the remnants of the red-hot body. Millions of years unknown and mysterious forces of nature attracted particles of the cloud, thus forming a ball. The new heavenly body was condensed in its structure and became increasingly massive. Unexpected pressure in the center of the ball lit a fire, which was no longer extinguished. This flame enveloped the whole body - this is how the Sun was born. From the remnants of the dead star, planetary balls formed over time.

Before the beginning of the first era of the Earth, the structure of the planet wassufficiently loose and loose, its dimensions were even greater than that of the Sun. Over time, the bowl was condensed and began to heat, but then its surface cooled. Before it became possible to fly into space, it was impossible to estimate even the approximate age of the Earth, and the samples from the Moon, which is considered the same age as our planet, showed that the beginning of the history of its development was laid 4-4,6 billion years ago. Famous paleontologists at one time created a special geochronological scale, which, in fact, is a chronicle of the creation and development of life on the planet Earth. This scale was divided into periods and eras of the Earth, the duration of some of them is measured by hundreds of millions of years.

ARCHAEV. It was in this era that the evolution of the Earth began. For two and a half billion years the planet cooled and was covered with a solid stone crust, there was no oxygen in the atmosphere. When the temperature reached one hundred degrees Celsius, the sky was tightened by dense clouds and it began to rain heavily. After that on the surface of the globe appeared the seas and oceans, in which subsequently life was born - microscopic cells capable of secreting oxygen.

PROSTHEROZOY. The Archean era of the Earth is more closely associated with organic life. At the time of the Proterozoic, multicellular organisms appear. Unicellular organisms united, increased in size and formed nuclei and membranes. There were many different forms of constructing the structure of living organisms.

PALEOZOIC. In the time of Paleozoic, active development of land by marine organisms began. This stage was divided by scientists into additional eras and periods, which makes it possible to study them in more detail.

CAMBRIA. The era is also known as the "skeleton revolution". And this is done knowingly, because it was at that time that existing organisms acquired solid skeletons, as well as thorns, "houses" and shells.

THE ORDOVIK. At this time reigned beings who remotely resembled modern scorpions and poisonous spiders. Small clams also appeared. But the most important achievement of this period is the appearance of vertebrates, specifically chordates.

Syloor. The new period was marked by the modification of fish, the release of algae from the seas to the land and the appearance of vegetation on the rocks.

DEVONIAN. Many scientists call this period "the kingdom of fish." Evolution of terrestrial organisms also continued.

CARBON. Dawn of flora and fauna: everything turned green, blossomed. Ancestors of modern coniferous trees have appeared. Insects have mastered the air. Some of them were huge: thus, the span of the dragonfly wings could reach two meters.

PERMIAN. Perm is the age of all-consuming deserts. During this period, Pangea was formed.

The Earth Era and their study provides an opportunity for everyonefrom us to know the history of the emergence of our unique world, nature, life and development of all orgasms on the planet. The history of our planet is the most mysterious of all that exists today, and if you know its laws, you can discover a lot of interesting and unexpected.