Paleozoic Era
The Paleozoic Era was a period of time lasting from 541 million to 252 million years ago, when many of the first complex forms of life evolved. It is known as the "Age of Fishes," as fish dominated the oceans, rivers and lakes of the time. This period of time saw the emergence and diversification of numerous invertebrates, such as corals and molluscs, as well as the first land animals, such as amphibians and reptiles. We owe much of our understanding of the ancient Earth to the fossils of these ancient creatures and the rocks formed during their time. The Paleozoic Era is an important time in the Earth's history, and provides much insight into the history of life on our planet.
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