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The Cambrian Period was an important point in the history of life here on earth. This is the time when many of the major groups of animals first showed up in the fossil record.
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Is the second oldest period in time. This is the time of the fish
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The Silurian was a time when the Earth went through many changes that had important repercussions for the environment and life within it.
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The age of the fish. North America and Europe collided forming a large continent called Euramerica.
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The beginning of the Carboniferous had a more tropical and humid climate than what we have today.
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this was the last period of the Paleozoic Era. The age of the dinosaurs.
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Reptiles took over the world. :Largest extinction event in history.
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The second phase of the Mesozoic era Many dinosaurs ruled the earth.
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