How life on earth began

How life on earth began

Today we human are advanced, we can see many light year away from earth, We can go in space, and discovered many planets, because of science we can get are answers, but we don't know correctly how the life began in earth.

How life on earth began is one of the greatest mysteries in the universe. To find the answer scientists are investigating problem in many ways. Some scientists studying about how life on earth began is it comes from our earth or any other planets. According to some theories aleins comes and start life here, some scientists fare trying to finds fossil and 

Life in other planets or moon to detect 

how life began on earth. According to scientists 77 lakh species are present in earth but only 15percent of species are identified but the mysteries is was that how the comes.

To know how life began on earth we have to go in flashback around 4500 billion years. Earth planets rotating over sun when earth was a huge lava ball slowly the lava cooled and then earth Separate his moon after the temperature of earth cools earth discovers a solid surface.

Before 3900 billion years earth earth face The late heavy bambordment, where earth face many meteor site. Because of meteors in earth water and mineral are discovered.

When earth is huge ball of lava.

After that meteorsite was again comes but they take mineral, vitamin, protein and other gas which was mixed in oceans which are prescent in deapth of water. But there is no way to go sunlight in such deapth of water, but in the deapth there are chemneys which help the water to keep warn, then bacteria discovered. Around 3.5 billion year before the spreading of bacteria is very quickly in water then the formed the rock which is known as stromatolities which is formed of full of bacteria.

Stromatolities

Stromatolities takes sunlight as food and they oxygen was discovered which is main suspect of life. After 2 billion year in earth there is no complex life and big continent are formed but then the crust of earth are moved and the land of earth breaked into many tectonic plates and because of that movements land start mixed and formed a big supercontinent called Rodinia.

Around 75 crore years ago supercontinent start breaking, and lava inside land comes out beacuse of lava the amount of carbon was increased jn air after that carbon are formed like clouds and acid rain starts because of lava, acid rain and carbon sunlight was no able to goes on earth then the first and longest ice age formed.

Ice age

Around 64 crore years ago again the amount of carbon in air increased because of carbon the ice starts melting and this way the the end of ice age occur because of this the amount of water and heat rise on earth and the bacteria formed many multicellular organism like palkia, archopers,naktus and pikaia. Pikaia was only 5 cm long but only the multicellular at that time which precent the backbone and discovery of plants in water occur.

Around 46 crore years ago supercontinent are breakdown in many continent but there are no living organism and plants are present in land or earth. Then oxygen increased and sunligh it mixed then ozone layer was formed which covered full earth with its layer and prevent earth from untra voilet raise of sun. Then the grass the first plany on land was discovered. Then the Fish live in ocean named TIKTAALIK. The first fish to decide to come out from ocean and try to walk on land with there wings after 36 crore year they are totally lived in land and turned into TETRAPODS. And TETRAPODS are the animals which are the ancestors of dinosaurs and many other mammals but after some times Again the earthquake comes and lava comesout, carbon increased in air then some oragnism try to live under earth.

Tetrapods.

Before 20 crore years ago earth looks changed and because of lava earth make again a supercontinent named pangea. Then tree are discovered the organism which successfully lived in underground and after the gives a birth to a big and gaints organism which rule the earth at that time name DINOSAURS.
There are many species od dinosaurs are present at that time like some are vegetarian, some are non veg. Some are aggressive and some are kind Almost 11  crore they rules on earth.

but after what happen that the dinosaurs are disappear and human are introduced that we will know in next blog.

TO BE CONTINUE..