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By facebooker_10209277156839410
  • 600 BCE

    Spontaneous Generation

    The first person to mention the Spontaneous Generation theory was Anaximander, a Greek Philosopher
    What this theory stands for is that life generated from non-living matter. That randomly out of a reaction for non-living things came a living organism such as a cell.
  • 40 BCE

    Panspermia

    First mentioned by Greek philosopher Anaxagora.
    The theory talks about that life is throughout the universe in meteorites, asteroides and other space objects. With this being said this theory also talks about that if this is correct, life should have arrived to Earth in an asteroid or any other space related object that might have been carrying small forms of life.

  • Darwinism

    Darwinism talks about the theory of evolution which is considered the most realistic and more accurate, mentioning this process and theory nucleus as "Natural Selection". That, in summary says that only the strongest will survive and reproduce.

  • Biogenesis

    This theory, proposed by Louis Pasteur. Talks and mentions that organisms can only come from other organisms. With this said, the theory talks about that reproduction among living things is the only way life can pro-create.
    We can say this is the counter part for the Spontaneous Generation theory

  • Endosymbiotic

    Russian botanist Konstantin Mereschowsky formulated this theory talking about the evolution of Prokaryote and Eukaryote cells into different type of cells.
    It also talks about the origin of chloroplasts and mitchondrias, that come from eukaryote cells.

  • Physcial-Chemical

    Stanley Miller did a series of experiments to figure out if it was possible that the first amino acids and sugars were created from a reaction in the primitive atmosphere. This reactions could've been cause by several elements and something such as a Electric Spark. From this reaction some basis for life could've been created.

  • Conclusion

    I think that all of these theories are somehow all connected, even if its in they're way of discovery. But they all try and look for the same objective. The origins of life could've varied and we might never know the complete right answer, but all of the theories mentioned were published and recognized somehow. They have to have some level of possibility. They affect us when it relates to our history and things that might go along our ways of beings.