The Great Ordovician Biodiversification Event / / ed. by Barry Webby, Florentin Paris, Mary Droser, Ian Percival.
Two of the greatest evolutionary events in the history of life on Earth occurred during Early Paleozoic time. The first was the Cambrian explosion of skeletonized marine animals about 540 million years ago. The second was the "Great Ordovician Biodiversification Event," which is the focus...
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