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Paleozoic - Wikipedia
Paleozoic Era | Description, Climate, & Facts | Britannica
Paleozoic Era summary | Britannica
Paleozoic | U.S. Geological Survey - USGS.gov
The Paleozoic Era - University of California Museum of Paleontology
Paleozoic Era: Facts & Information | Live Science
11.2: Paleozoic Evolution - Geosciences LibreTexts
Periods of the Paleozoic Era - ThoughtCo
Paleozoology - Wikipedia
Life of the Paleozoic Era - University of California Museum of …