The first ammonoids also arose during the Devonian. Related to octopuses and squid, these marine animals survived until the end of the Cretaceous period, 65 million years ago. Plants began ...

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One of the most important milestones in the evolution of life began some 400 million years ago, when the first animals made their way from water onto land. At that time, known as the Devonian ...

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The initial radiation of vascular land plants, evidenced by increases in both diversity and morphological disparity during the Silurian and Devonian ... of marine animals. During this period ...