-
Cambrian 5570-500 MYA
Trilobites dominated -
Paleozoic 543-348 MYA
the first time there was multicellular life forms flourishing the earth -
Mesozoic 245-208 MYA
this time period is the time period when dinosaurs roamed the earth. marked by the KT extinction -
Cenozoic 248-65 MYA
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. -
Pre-Cambiran 4800-3800 MYA
its about 5 times as long as the paleozoic and mesozoic time periods combined. the oldest life forms are bacteria.
