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Sun was formed and dust was surrounding the sun, creating a simple solar system
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Eath was formed from from the collosion of rocks and dust particles
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Space collosions cease and the Earth cools down.
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First cellular life formed, Archeabacteria
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The gases of earth combined with the electrical charge of lightning create first nucleotides, ATP, and amino acids
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First Stromatolites populate the earth
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The first photosynthetic Organisms formed
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The Earth was finally shaped as it is today
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Earths O2 levels reached what they are today.
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The first endosymbiosis occured. A prokaryote was consumed by eurokaryote and formed a symbiotic relationship
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Ozone (O3) formed, protecting organisms from UV rays so they could exist on land.
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Francesco Redi wanted to test the theroy of spontanious generation, so he allowed flies onto a piece of rotten meat, and put it in a sealed container. He also put a piece of rotton meat that flies had not been put on into a sealed container. The meat without flies generated no maggots, but the container with flies generated maggots
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Spallanzani wanted to test the theroy of vital force in the enviroment, so he boiled two flasks with chicken broth, and sealed one of them. The unsealed flask developed microorganisms, but the sealed flasks developed no microorganisms.
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Louis Pasteur wanted to test the tesroy of vital force in the air, so he used a curved-neck flask and left it unsealed with chick broth in it. This allowed air to flow through the flask, but microorganisms were trapped in the curve of the bottle. It developed no microorganisms, proving there is no vital force in the air.
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Oparin hypothesised that organic materials could have formed in the early earths atmosphere from the various gasses and conditions
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Radiometric dating is developed. This uses the natural decay of carbon-14 and carbon 12, and uses their known half-life to generate a date of how old the specimim is
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Urey and Miller tested Oparin's hypothesis on organic materials bbeing generated in earth's early enviroment, and sucessfully generated amino acids, nucleotides, and ATP, the neccessities for life.
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Sidney W. Fox studied many physical structures that may have been first cells.
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In 1970, a meteorite crashed to earth, containing a broad mixture of organic compounds, creating contreversy of organics being delivered to earth via meteorites.
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Marigulis proposed the theroy of endosymbiosis, in which a prokaryote was consumed by eukaryote and continued to function in a symbiotic relationship
