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The beggining of life forms that we know of.
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The oldest single celled organisms fossils date back from this time.
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Rock formationsin Western Australia date back from this time
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Viruses are preasant bythis time.
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Earth freezes over, due to lack of volcanic activity.
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The first multicellular organisms overcome their first split, sponges and Eumetazoa.
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The planet freezes over again.
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The ansestor of cnidarians breaks away from other animals.
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Strange life forms called Ediacarans appear around this time and persist for 33 million years.