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Trilobites dominated
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the first time there was multicellular life forms flourishing the earth
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this time period is the time period when dinosaurs roamed the earth. marked by the KT extinction
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the earth was very hot and alligators were alligators at the north pole.
homo-sapiens formed, The ice age starts later in this time period. -
its about 5 times as long as the paleozoic and mesozoic time periods combined. the oldest life forms are bacteria.
