I know sometimes you may have thought about how our dear planet came into existence, we have other existing planet in space and sometimes I ask myself for the reason why those planets exist, but the point this post is diving at is to give us a brief history about the planet we exist upon known as earth. How did we get here, all the things we read about in history books about events that has occurred decades ago, were humans in this form back then? This post should be able to provide answers to the questions asked about the history of our planet.
Scientists have given us various explanation on how the earth came to existence, although there have been reasons to doubt some of the theorems, there have also been reasons to believe some of them. The planet earth we have today was not usually like this, according to reports we have from scientist, earth was not habitable for human or microorganisms to exist on several years ago. The landscapes we have now where then fire from molten rocks, the temperature experienced on earth back then was recorded to be 4,700 degree Celsius, the normal air we enjoy now was filled with carbon dioxide, nitrogen, sulphur and water vapour. Rather than the land we have now, the earth was filled with magmatic ocean, large asteroids kept on pushing their remains on earth. All this was the happening on earth as at 4 billion 540 million years ago.
Scientists reported that the moon was formed as a result of a collision with a small planet called Theia. After millions of years, the earth experienced a great bombardment from asteroids, scientists believe that the asteroids carried with them a tiny amount of life while coming to earth and it was through this that a large percentage of the world ocean began to exist, the bombardment subsided but it also resulted into a gradual temperature decline.
The water that existed then was said to bear microorganisms but the lands were still made up of volcanoes, an entire day back then lasted for only 6 hours and gradually a day began to last for up to 16 hours. Certain continents also began to exist, the first continent to exist is Kenorland and the second continent was Rodinia, it lasted about 400 million years for the creation of Rodinia after Kenorland, the third continent was Pangaea, but even with the creation of this continent, scientists believed that everything that existed then was made up of snow. The volcanic eruption gradually began to melt the snow and from the melting process, a remarkable amount of oxygen was released.
The Cambrian explosion was the saving grace that occurred to planet earth because researchers believed that it was after then that temperature got to the point of 30 degree Celsius, the impact of oxygen on earth increased and this resulted into having the existence of so many organisms and humans, it was during this period that habitation began for living organisms and some animals began to develop exoskeleton as a means of protecting themselves from other animals, this explosion also resulted into having a day made up of 22 hours.
The first insect was said to have appeared 419 million years ago, after some years power was fully delegated to mammals who began to fend for themselves and exist on their own, it was until 4 million years ago that there was a great climatic change and from the ape world, humans began to stand up straight and fend for themselves, other animals followed the process of looking for food in the forest to survive but it is only human that got through the complete process of thinking and using the mind to make special tools for his own disposal.
Different human forms began to come up, Homo sapiens came into existence and began to dominate the world, and humans began to give birth to a smaller version of themselves as well as coming up with new ideas to make the world convenient for them and their offspring’s.
