Origin of Life

Origin of Life : A complex subject. If we are seeing on earth we can see many species of life which can fly, swim, walk, run, jump, plants, trees etc...
Probably all life forms on earth may be formed from one or few initial life forms. But how it might have happened ? Just imagine earth was like someother planet which does not have proper atmosphere, no life forms, no trees, no air, no water and ofcourse no sound. Also each planet forms its own environment depends on the concentration of chemical elements, mass, formation patterns etc. It keeps its own equilibrium .
abiogenesis
Best part of any theory starts from assumptions. Just imagine earth was one like them. Earth is estimated to be about 4.5 billion years old. Earth might have faced many impacts from external objects from space. Many theories tells that earth formed from Sun (?). One portion of earth moved as Moon. It can be a bombardment with celestial materials and some portion moved out. Some portion of Earth moved out with celestial substances and because of heat all vapors are escaped from Moon's atmosphere (or escapted to earth).

Assumption is that Earth contains Water in some other form like carbon dioxide and sulphor compounds, which under specific pressure conditions released water. In this pressure conditions some small minor factories released the water or oxygen. These small pressure conditions may be self sustainable. This can be one form of initial life.
Or it can be some bombardment from hit earth which had some earier life form, which can be self sustainable mechanism, which might have adpated to earth's conditions and might have changed the atomostphere with many small sustainable reactions.

Another theory tells : After earth's creation the earth is moved away from sun and radioactive decay started. some point the heat become matched the water came out of gas form or from earth separating minerals. this filled other part of earth.
Or It can be a bombardment on earth whihc caused to release water vapour in a chain reaction with reaction with bombarding meterorite.
Life formed first or proper water formed first ? Initial life forms may not need oxygen to live. Initial molecules, which performed simple chemical reactions that eventually led to a self-sustaining system involving the formation of more complex molecules. It is self sustainable systems which later coded to DNA .. RNA etc.. Inital life forms released oxygen into atmosphere from the earth.

Another theory creation time earth was filled with vapor and chemical dust. Which covered the atmosphere and created a upper layer. This covered earth from the sunlight. Earth started loosing heat slowly and some kind of pressure developed inside. chances are there that the upper layer is very thick and solid. which created many reactions inside with low temperature mode than the crust or upper layers. Some ideas like the electrical and magnetic field created some electrical waves which simulated the chain factories. this fomred some modulation towards life to tick. Some of the initial forms created wall by accident or sustained durations it started protecting the self mechanisms.