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The soloar system was a swirling mas of dust and gas
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The earth began to form and grew larger as debris was pulled together
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organic molecules accumulate
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archaeabacteria are belived to have casued the first cellular life on earth
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cyanobacteria are discoved
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Photosynthesis arises in certian organisms
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Oxygen as a bioproduct of photosynthesis damaged to many of the early unicellular organisms
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02 levels reached todays levels
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Eukaryotic cell evolves from a aerobic prokaryote (called endosymbiosis)
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Ozone(O3) formed - protected organisms form harmful UV rays so they could exist on land
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Spanllanzani conducts his expiriments and finds similar conclusions to Redi's
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Lynn Margulis porposed eukaryotic cells were formed from prokaryotic cells
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Fox studies the phsyical structures that gave rise to the first cells
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Thomas Cech discovers ribozymes, RNA that acts as a chemical catalyst
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Louis Poster conducts his expiriments on spontaneous generation
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The invention determines earths age by testing rocks
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Alexander Oparin forms a hypothesis that the early atmosphere contained NH3,H2,H20,and compounds of C and H. At high temperatures these gases could have formed organic molecules.
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Urey and Miller test Oparins hypothesis showing results that agree with his hypothesis
