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Solar system was a swirling mass of gass and sun began to form
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earth began to form
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Organic molecules began to accumulate. Oldest known rock and crystals are from this time
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scienctist infer that organic molecules began to accumulate
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Fossils of stromatiltes as old as 3.5 bya are known
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Some forms of life had become photosynthetic
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Earth appears how it would look like now
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O2 levels reached today's levels
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A type of small aerobic prokaryote was engulfed by and beagan to live and reproduce inside a larger prokaryote Theory called endosynbiosis
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Ozone(o3) formed-protected organisms from harmful UV rays So they could exist on land
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Redi's Experiement observed tiny wormlike maggot, from which flies emerge Redi tested the principle of biogenisis Microscope-scientist started using them same time redi did his experiment
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Spallanzis experiement tested hypothesis of spontaneous generation of microorganisms
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pasteur's experiment-won a prize for clearing up spontaneous generation
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Lynn margulis-early prokarytic cells may develop a mutually beneficial relationship
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Thomas Cech-Found out that RNA found in a unicelluar Eukaryote acts as a chemical catalyst
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Fox- Done extensive research on the physical structures that have given rise to the first cell
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Radioactive dating- method of establishing the age of material
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Urey and Miller- Test Oparin's hypothesis and made compunds such as amino acids that are found in water.
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Oparin's hypothesis- thought that early atmosphere cpntained ammonia
