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Solar Nebula
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Period: to
Biology
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Earth has shape
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Metal Core
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Oceans begin forming
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Hydrosphere formed
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Liquid water
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supercontinent vaalbara
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Oldest fossils
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Firsrt prokaryotes
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Formation of supercontinent Ur
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Supercontinent Kenorland formed
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Oldest fossils
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Enough oxygen for photosynthesis
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Supercontinent Nena and Colombia
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First eukaryotes appear
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Soft-bodied organisms appear
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Explosion of life, hard-bodied organisms appear
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Ozone layer forms
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Land plants appear
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First fish
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First amphibians
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1st reptiles
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First mammals
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Dinosaurs appear
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Flowering plants reproduce
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Dinosaur extinction
