No one really knows for sure but one of the best
theory asserts that life started in the ocean
since several billion years ago, oceans were
covering the major part of the earth surface. It
is also thought that life came about from and
assembly of molecules and atoms coming from outer
space. These molecules formed the first living
cells which then assembled to form more complex
organisms such as plants, fish....
were not there so it is only a scientific theory
based on assumptions and a few facts.
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