Paleozoic Era

Paleozoic Era

Author: Nathan Lampson
This lesson illustrates the paleozoic era of the history of the earth.
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Introduction to Psychology

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The paleozoic era was a period of time 251-542 million years ago.  During the paleozoic era, vertebrates (animals with backbones) began to diverge.  A number of various organisms were found for the first time; tetrapods, insects, and the first vascular plants appeared around this time.  An explosion of different types of animals occurred during the paleozoic -- the land was colonized by plants and invertebrates as well.


At the end of the paleozoic era a mass extinction took place.